350's arn't exciting in a straight line if your coming from any Jap turbo car. Ive had Evo's and Skylines before and they are insane, but the 350 whilst slower in a straight line and also round the bends just feels lovely. The seating position the N/A factor and the smooth acceleration all heighten the pleasure, i bought a Z before when i wasn't doing well in work and as soon as i got a decent pay rise i went back to an Evo, within a few months i was missing the looks the Z got the sound and more importantly the way it flows round bends.
Personally i would say if your after speed a Z isnt going to do it but as a driver experience ive not had better.