
Coway
Airmega AP-1512HH Mighty
Durable, effective for allergens/odors, but loud on high.

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I have had great success with Bluair
I have a 401 auto and older pro model IIRC. You can get a two pack at Costco for a decent price.
I have one and think it is worth $50. I got it at Blueair and it was on sale for $300 or so off. It's a very expensive air purifier and three filters are need. If you want odor control, too, you must get the [Classic 500/600 Series DualProtection Filter](https://www.blueair.com/products/500-600-series-dualprotection), as opposed to the filters that just clean the room. They range from $120-150 for three, depending on where you buy them online. The Blueair website even has a subscription plan where you get a discount for subscribing. I'm using it in a foyer which is connected to a living room and dining room, and it works fine. The foyer is right off the breakfast nook and kitchen, and it does an excellent job eliminating cooking smells that drift into the foyer and can travel upstairs. The first two speeds are quiet, but the third highest speed is very, very loud. I also have the Blueair 211+ and 211 Auto in other rooms and really like them, too. If I need air purifiers in the future, I will always buy Blueair.
I have two Blueair purifiers that can get very loud on the highest setting--the 211+ Auto and the Classic 500/600. The latter one was discontinued and the 211+ can still be bought at Amazon, but not at Blueair. Finding OEM filters is no problem for either. You might also consider a sound machine that has fan noises and can get very loud. The loudest and best one I have found is the one below. It has 10 fan sounds and 10 white noise sounds, and the only machine loud enough for me. [https://www.lectrofan.com/collections/lectrofan](https://www.lectrofan.com/collections/lectrofan)
I have one and think it is worth $50. I got it at Blueair and it was on sale for $300 or so off. It's a very expensive air purifier and three filters are need. If you want odor control, too, you must get the [Classic 500/600 Series DualProtection Filter](https://www.blueair.com/products/500-600-series-dualprotection), as opposed to the filters that just clean the room. They range from $120-150 for three, depending on where you buy them online. The Blueair website even has a subscription plan where you get a discount for subscribing. I'm using it in a foyer which is connected to a living room and dining room, and it works fine. The foyer is right off the breakfast nook and kitchen, and it does an excellent job eliminating cooking smells that drift into the foyer and can travel upstairs. The first two speeds are quiet, but the third highest speed is very, very loud. I also have the Blueair 211+ and 211 Auto in other rooms and really like them, too. If I need air purifiers in the future, I will always buy Blueair.
I had a couple of Winix 5500? units and now have a BlueAir 211+. I tend to open the balcony door when I cook so most of the smell vents out, and I live in a place that's not too dusty, so it works well in reducing dust on furniture. Unfortunately my place has wall to wall carpets. Is it worth it? I don't know. Less dust and obviously the dust stuck in the machine is dust not on the furniture, but is it reduced enough to where I'd buy it again? Not sure. My place is 988 sqf, so pretty small too. A few things to keep in mind; A lot of them have no real testing done, just bloggers who claim it does something. Filters can be expensive. They usually need to run on high to reach their CADR, and on high they are usually noisy, so I can only run mine on low or medium in the other room. No chance using it in the bedroom if I'm in there.
I have a Molekule and it’s sitting stored. The replacement filters are expensive as hell, and I find my BlueAir (the 211+) and Coways (Airmega 250 and 150) to be better. The latter aren’t “smart,” (although I think you have that option now), but I have them plugged in with smart plugs and I like that the Coways signal when the air quality changes like a basic air quality monitor would.
If you're looking at the Winix C610, you could also look at the T810 which has higher CADR and right now is going for cheaper ($185 on Amazon). Very similar looking models. Technically it would be "overpowered" but that just means it'll perform better at lower air speeds, which means you could operate it quieter than others. I know a lot of people really like the Blueair 211 and it's very popular. I'm personally not a big fan of the pre-filter and I found the fan noise of a different Blueair model to sound more high-pitched. Minor complaints and very much personal preference.
Well the larger 211 is still trucking after these years so that is why is just repurchased the improved model.

Coway
Airmega AP-1512HH Mighty
Durable, effective for allergens/odors, but loud on high.

Levoit
Vital 200S-P
Smart, effective dust/odor; some find replacement filters pricey.

Winix
5500-2
Budget king, durable; poor VOC removal, Plasmawave disliked.

Coway
Airmega Mighty
Durable, great for allergies/dust, responsive auto-fan.

Winix
5510 & 5520
Good value, durable, effective for pets; carbon filter issues.

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IKEA - UPPÅTVIND

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CleanAirKits - Corsi-Rosenthal Box

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Austin Air - Healthmate Plus

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Winix - 5500-2

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Coway - Airmega 400

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Coway - Airmega AP-1512HH Mighty