Don't know - would have to drive the f430, but having seen/heard a few wizzing by me, I've gotta say I'd be tempted to get the Ferrari.
On the other hand, a Black/Orange GT3RS would be pretty sweet too. The GT3RS really seems like it might be a collector car. While Ferrari's are pretty rare, a GT3 RS seems like it would be a very rare and special treat. For half the price?
On a related note, I have a 360 and am still conflicted on whether to buy the new gt3. Beauty, exclusivity, craftsmanship, and sound vs. sheer technical brilliance and performance?
Tough call, each car appeals to different needs/wants.