
SEBO
AIRBELT E3 Premium
Ultra-durable, 10-year warranty, but expensive with short cord.

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I had a miele because my parents had one of over 20 years. Mine (blizzard cx1) however barely made it to 5. Had to disassemble and clean the head so often, then had to buy a replacement one. The plastic bit on the handle broke off. The engine and suction power is great, the hardware is inferior. It was one of the most disappointing purchases of my life.
I have the Miele Blizzard CX1, I bought it 7 years ago on sale and it has been fantastic. I had tried a bagged Miele and it was amazing, so I was weighing up whether I wanted to go that route but I was worried about sourcing bags so I went with this instead. I had tried a friend's Dyson before buying this and was not impressed so I'm very happy I went with a Miele.
This is probably a silly question and I promise I don't mean to be condescending asking it, but the filters on the blizzard are a bit hidden. You've found the compartment situated behind the dust container which contains the big round filter with folds right? That's the main thing which needs to be cleaned out. Just want to make sure theres not a quick fix to get it working a little better for you. Otherwise the other comments are correct, the bagged models are generally better. And I don't recommend the turbo brush head for any serious carpet cleaning, motorized heads are far better.
Sebo or miele if you want something high quality which will actually last 15+ years and be repairable should a part wear out. They have high performance and filtration standards. The shark is fine for 3 to 5 years with decent performance. The dyson, being cordless, you should only expect 2-4 years. And it won't have the performance of the others unless used on it's highest but shortest runtime mode. Kinda comparing apples to oranges here. If you need something immediately the shark is probably ok, but if you want something to last definitley go check out miele and sebo.
Miele blizzard. It’s an ‘old school’ style but bagless and the best vacuum I’ve ever used (Dyson is absolutely overrated). Sticks don’t cut it and the rollers irk me too. Forever cutting hair out of it and always end up reverting to the blizzard when I want to do a proper job. I also find that the ones with the roller, they kick back stuff on hard floor? And when you turn it off, suction doesn’t feel as intense? With the Miele, I make sure the bristles on the head are on (manual press the button down) when I use it on rugs and carpet. This thing ends up with SO much hair inside the capsule, it absolutely does its job. Also side note, when I purchased the lady said the bagged ones will always have the best suction, so food for thought. I just CBF so went the bagless option and I really rate it.
I have had the Blizzard CX1 for 6+ years and love it! While the cordless could be more convenient, I recommend going canister bag less; you don’t want a rechargeable battery quitting when you’re not quite done cleaning! You’ll have the canister for years to come!
I have the miele turbo. It thoroughly cleans area rugs and low pile carpet, and hardwood floors with 3 low shed pets and 5 people.

SEBO
AIRBELT E3 Premium
Ultra-durable, 10-year warranty, but expensive with short cord.

Numatic International
Henry Canister Series
Budget king, super durable, but heavy and poor on carpets.

SEBO
AIRBELT D4 Premium
Durable, powerful, long cord, but heavy and pricey.

SEBO
FELIX Premium
Durable, powerful, good for allergies, but heavy with awkward attachments.

Miele
Classic C1 Cat & Dog PowerLine
Durable, powerful, quiet, but very expensive, short cord.

Ranked #1
SEBO - AIRBELT E3 Premium

Ranked #1
SEBO - AIRBELT E3 Premium

Ranked #1
SEBO - AIRBELT E3 Premium

Ranked #1
SEBO - AIRBELT E3 Premium

Ranked #1
Numatic International - Henry Canister Series

Ranked #1
Dyson - V15 Detect Series