But before i pull the trigger..... how will the fitment on an S2000 be?

MRR HR8 rims..... or HR4
19x8 et45 all around..... planning on running 215s since my car is really low
19x9 et45 in the back is an option.. but im thinking 19x8 is the safer route

comments from people actually running 19's would be good...

 

We need a facepalm emoticon.

To answer your question, a lot of people run that width and offset. 19's shouldn't be any different as long as you keep the tire diameter the same as stock.

 

This good enough?

This would work too:

 

I agree...raise the car, roll the fenders, do 19 x 8 225s and 19 x 9 are 245s

 

*and