engine harshness at high revs

iwantone09

i am heavily considering a 370. i've driven 3 370z's, first, a manual, then an automatic and then i went back and drove another manual. the reason i keep test drving them is because i needed to see if the rough engine and vibration in the shift knob was just in the first car i drove or was it a traight with all of them. when i first drove the car, i noticed a slight vibration in the shift knob of the manual. i honestly thought something was wrong because of the vibration i felt in my hand. that vibration disappeared with the auto. so i went back today at lunch and drove another manual and sure enough, i felt the vibration in my hand again. i could probably deal with it, but it would take some getting used to. as far as the engine, i didn't feel any vibration in the steering wheel or car, but all of them sounded rough when accelerating. it didn't purr like that g35's did when they came out. i currently have an 08 honda accord v6 coupe with a 3.5 motor. although my car has less power and torgue, my car is much smoother than the 370z. one of you guys talked about the size of the engine possibly beeing a culprit. based on what i've read, nissan probably should have kept the engine at 3.5 liters to keep the vibration down witout having to add so much counter balance. i don't know. i love the 370z and it's still on my list right now, but i will admit that coming from my silky smooth vtec v6 and drving my boys' bimmer 335, going to that rough engine would play heavy in my decision process. it's still a hell of a car though.