that shouldnt' even be a question...i have a 91 yamaha virago...1100 cc's, all chromed up with chopper pipes (which incidently increase horsepower from increased back pressure), but it still wasn't fast enough. my friend and i used to drag race, and with my huge low end torque, i kept up up till 50 mph, when i had to switch out of first...that mother fucker didn't hit second gear till 75 mph...there was no chance. as soon as i switched, he was gone without a trace. additionally, he could pop a wheely, and accelerate at 90 mph, as if he were at a standstill. fucking incredible. ever since riding his zx-7r a few years back, and feeling the fucking power...i need one. if i were you, i'd definately go for the suzuki GSXR 750 or 1000, or a yamaha yzf R1 or R6. they are the fastest all around bikes around... if you're looking for drag racing, a hayabusha or zx 12R are the fastest at less than 10 seconds...if you're looking for top end, there is nothign faster than the zx 11 (tested at 215 mph).
gh is fine and all, not that i've ever done it...but fuck it. get the bike!!!