I'm very happy with my new Anycubic Vyper printer. Only thing which bothers me
is its noise. Thus, I decided to upgrade the fans. You'll need a 8015 24V fan for the mainboard, a 6010-6015 12V fan for the power supply, 2x 4010 radial 24V fans for part-cooling and a 4010 24V fan for the hot-end. I went for double bearing fans, but didn't change the part cooling fans yet (so I reduced their speed to 50%). Overall, the printer is now significantly more silent but fans are still noticeable.
http://on.fb.me/unboxingexperience