I added the GamerFinger HBSF-G2 (x6) buttons to my Atrox, and also swapped in a Hayabusa.
They have the standard Cherry MX Red key switches.
I like these buttons. Really quiet and responsive.
Hard to compare these to any other buttons, because nothing else feels like them.
I might get another set of six in white or crystal, to add to my PS3 Fighting Edge.
Things to take note of:
If you are used to the loud tapping sound of Sanwa OBSFs, it may throw off your rhythm.
I had the plunger pop off two of the buttons, during hard, rapid pressing in succession.
They are a bit of a tight fit when first installed, so be careful.