Also, what would 40 offset do to my wheels in the front and back? will it sit flush? or different on front and rear?

Use this 1010TIRES.COM - Wheel Offset Calculator

9.5 all around if you are going squared setup (same size tires front and back) would be my pick.

assuming you go with the m510 I'd go 9.5 front 11 rear with 265/35 front 305/30 rear. this is a forum favorite for 19" wheels.

as for 40 offset on 9.5 all around I think you'd be starting a new trend called hellatucked where the goal is to not see the wheel at all. I jest but certainly you'd want spacers for a flush look especially in the back.

advantage of going with the 11" on the rear is you can get custom offset according to the getyourwheels site. so no spacers in the back. probably recommend a +15-20 offset.

also to be that guy: search the forum there are hundreds of threads on offsets, wheels, tires, etc. this should get you started though http://www.the370z.com/wheels-tires/...pecs-only.html & http://www.the370z.com/wheels-tires/...-101-a-21.html (vicious's post in particular)

number two, followed very closely by number 1. how concave is number 2 in the rear (staggered)? would highly recommend the more concave wheels, but the color of number 2 is beautiful regardless. couldnt go wrong with either choice.

Looks like you got some homework to do. Try and learn how offset works so you can decide what look you want. Your going to get a lot of opinions on what rim you should get and what offset you should go with. Me personally,I would go 10" up front and at least 11" in the back. But that's me. In the end,what you put on your car sais something about you. YOU DECIDE. :tiphat: