I recently bought a wheelset for a new bike I built. The wheels have DT240 hubs but I'm very suspicious they're knock-offs. Here's what I ordered: https://www.ebay.com/itm/225762245586. If they weren't so loud these would be perfect, and I have no complaints overall.

The loud, buzzing noise while coasting is unbearable. It seems that quietening them by adding grease is tedious and doesn't work that well anyway. I want a hub that's just quiet and doesn't require more than normal/routine service.

It might be cheaper to order a new wheel than trying to rebuild my wheel with a different hub. Can anyone make a recommendation? I have another cheap carbon wheelset that used DT350 hubs, and I think these are probably legit (from BTLOS). Maybe those are the sweet spot for me in terms of getting a reasonably quiet hub which is low/easy maintenance. Who sells a good/legit DT350 wheel I can use as a replacement? Should I just cut to the chase and go back to BTLOS after learning my lesson?

Thanks in advance for your advice or suggestions.

The twelve-year-old in me wants to buy a set of six-spoke wheels for a new MTB build (100mm FS XC frame).

They look cool but is it a waste of money? I can get a really nice set of carbon rim wheels with better hubs for the same price, and I never see any serious bike vendors offering these on a bike for sale, so I'm really skeptical. How bad are these likely to be for a normal recreational XC rider like me?

The fancy/expensive ones are from Bike Ahead: https://bike-ahead-composites.de/products/wheels/mtb/biturbo-rs.html
The more budget-friendly options I'm considering from China:
https://www.lightcarbon.com/lightcarbon-6-spoke-carbon-wheel-for-29er-mountain-bikes_p107.html
https://www.proxcarbon.com/prox-6-spoke-bike-wheels-carbon-29er-mountain-bike-wheels_p47.html

If anyone has experience with six-spoke carbon wheels like these then please chime in. Thanks in advance for your comments.

I'm considering a frame that looks to be reasonably close to a Specialized Epic Evo, which is the bike I thought I'd get before I decided to build something similar instead.

TanTan FM038: http://www.tantancycling.com/index.php?_m=mod_product&_a=view&p_id=916

Can anyone comment on this frame and/or any experiences with TanTan? Are there other comparable frames I should consider?

Thanks in advance for any comments or suggestions.