for $45,000 u can send ur Z06 to Lingenfelter where they'll add a twin turbo system, etc and push 800 HP out of it. that brings the total price to $110,000 and then you can spend the rest of the leftover money on beefing up the suspension. Now you can compare the two.
Really though, the GT is a sick ass car n got track written all over it, but if i had an extra $150k i'd buy a 360 Modena over a Ford anyday.