
Multiple Brands
DF54 Series
Great value for espresso, but clogs and poor for pour-over.

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Great reviews on the timemore 064 and 078 on pour over quality. I like the styling. Grinds relatively quiet and testing shows little to no ground retention.
It's also not that good for pour overs. I owned one for two years, and sold it to get a Timemore Sculptor 078, which is much better. Even with the Sculptor 064 you'll likely get better pour over, and they cost the same or slightly less than a Niche.
I bought the 064 about a month ago. For the price point it is EXCELLENT. For me, popcorning and retention are non issues… put the cover on promptly and give the machine a tap and use 2-3 clicks of the knocker. There is little mess and no real retention at all. Finally, and importantly the grind is AMAZING. Easy to dial in, consistent and delivers great shots. For the price point, I highly recommend.
If your most important thing is clarity, then you should be paying a lot of attention to the burrs. Unless you’re willing to swap them out. For example, a DF 64 with SSPMP burrs is going to have much more clarity than a timemore 64 with stock burrs. And visa versa.
Describe the coffees you drink (specific roasters and the regions/farms that are your favorite) and outline your brewing method(s) and water composition. Based on the above - we’ll be able to help you understand if it even makes sense to upgrade your 064. A lot of folks incorrectly feel an upgraded grinder somehow takes “decent” coffee with “decent” water and makes it amazing, but this simply isn’t the case.
timemore bricks 01s, a bit over half of your budget. Tinny sound and having it running before throwing the beans in means a change to the habits i grew using the niche zero. Gives a very solid feel nonetheless. Contrary to other reports, grinds perfectly fine for my espresso - that's using 49mm europiccola and 58mm E61. That also means 14g for the former and at least 16g for the latter. Using my usual beans - medium to light - i found little difference to my K6, which i actually prefer over the niche. For milk drinks, i found it perfectly suitable, even less bitter than the niche. I had good results even using supermarket beans (stale and overroasted) - important because it means this grinder definitely produces enough fines to grind traditional espresso with the appropriate body characteristics. I spat out that coffee, though - i don't particularly fancy the burnt rubber notes so prominent in these beans. I then gave it to a friend (that was the intention all along) that uses a gemilai owl and exclusively drinks lattes with oat milk. They use locally roasted beans, which means medium but not light, chocolate and nut forward coffee - so the standard all around (even in so-called fancy specialty coffee shops). Taking into account the number of latte art photos i've been getting, i'm convinced they like the grinder very much.
i was focussed on flavour, so i forgot to add the convenience characteristics: \- you can get it in europe (i got mine from a polish webshop) \- i have no static issues and don't use RDT. While it collects more bits and dust than the niche due to its construction, i found retention and exchange after those nooks are filled to be quite low, as low as in the niche. \- it's a single dose grinder, it's conical and burrs are sth like 32mm. \- it's easier to clean than the niche and needs no tools. \- it's smaller than the niche, which was an important consideration for my friend. \- i don't know how long it will last. It's fairly new in the market at over a year or two, it doesn't seem terribly popular (i suspect the size of the burrs puts "bigger-is-better" people off. I haven't used it very long, and i'd like to see it grind 20kg before i can have an opinion on longevity.
i've got a k6 and a k7, among others. Great grinders, have given me many moments of coffee pleasure. You haven't engaged with your thread yet, but the problem you're having is unlikely to be the grinder, like others have said. I got a timemore bricks for a friend and i've been testing it. I find it a very good alternative to the k6 and i prefer it to the niche for the kind of beans i buy. That's medium light, by the way. If you need a pretext to get a new grinder and have got eur250, then that's a possibility.

Multiple Brands
DF54 Series
Great value for espresso, but clogs and poor for pour-over.

OPTION-O
Lagom Casa
Versatile, premium build, high clarity; slow for large volumes.

Niche Coffee Ltd
Niche Zero
Durable, easy workflow, great for dark roasts, not light.

Fellow
Ode Brew Grinder Gen 2 Series
Excellent for filter/pour-over, but cannot grind for espresso.

Baratza
Encore™ ESP Pro
Durable, repairable, versatile, but loud, messy, poor for light roasts.

Ranked #1
Multiple Brands - DF54 Series

Ranked #1
Mazzer - Philos

Ranked #1
Baratza - Encore™ ESP Pro

Ranked #1
Fellow - Ode Brew Grinder Gen 2 Series