Need some help with tire sizes
 

So, I need to new tires very soon and I was wondering the Perfect size for my needs.

Car: 370z Base + Sport (Rays 19")
Stock Height (I must keep this height).

I would like the tires a bit wider and I don't want the car to look like if it was lifted (wheel gap).

I was thinking on Michelin PSS Front : 255/35/19 Rear : 285/35/19

Any suggestions, possible issues ?

EDIT:
After searching alittle more, i'm thinking on 265/35/19 in the front and then Rear 285/35/19 ?

Thanks in Advance