Hyde has 15(f) and 16(r)
Jekyl has 16(f) and 17(r)
My street set up, that is on Jekyl, I originally did because of cost and looks.
I bought Jekyl with 16s all around. When I bought I Hyde I bought four 17s and put them on the rear of both cars and moved the 16s to the front.
17s all around on an MR2 looks silly IMO.
The front looks jacked up.
This is what 16s/17s look like on Jekyl:
http://www.jekylhyderacing.com/images/jekyl_dc.jpg
This is 17s (same rim) all around on one of my old MR2s:
http://www.jekylhyderacing.com/images/bltmg.jpg
http://www.jekylhyderacing.com/image...DragRacing.jpg
http://www.jekylhyderacing.com/image...tocrossing.jpg
The fronts just look to big to me.
Anyway, on Hyde's race set up I based my choice on costs and what TIRES I wanted to run.
More importantly than rim size, you should figure out your tire priorities.
Once you know the tire sizes you want to run, figure out the rim size for them, THEN look at styles.
I would never stagger more than 2" front to back.
I think you are asking for way too much difference in sidewall behavior.
Just my 2 psi.