for btc there are three major companies

whatsminer the 50s model was good
ant miner.   the s19xp was good
Avalon.       the 1266 was okay


I speak for above as I owned them.

what's new

whatsminer

M60 170-174TH  26U/TH

antminer

January Batch  S21  200T         $23.5/T

above is from this link

https://bitcointalk.org/index.php?topic=5440613.msg63342268#msg63342268


Avalon  a1466 see link

https://www.canaan.io/product/avalon-made-a1466-150t