ORIGINAL: 5575gb
APA Black mamaba X1 is at 355fps IBO that has to be it from what I see.
http://www.apaarchery.com/bows_mamba_x1.html
Looks like it beats the bowech by 5 fps. Looks like the PSExforce is 348 fps. Martin slayer x is 350fps also, so I'd say they are about 5 fps behind the little Canadian bow companies speedster. Sorry to burst you bowtech guys bubbles!
Oh I just looked at the HCA speed force and it's at 352 fps, looks like a nice bow also but not the fastest!
http://www.highcountryarchery.com/