Offset / Spacer Question for all the stance bros out there
 

I recently found a beautiful set of Niche Misano wheels on craigslist with brand new Dunlop SP5000 sports for only $850. They are 18x8 et40 all around. That's practically stock size, with a slightly wider offset (et40 vs stock et 50). Now that that car is lowered on Tein Street Basis Zs, the tuck is rather apparent.

I plan on running spacers to fix this issue. I want to say the tires are 225s. My thoughts were 15mm in front and 20-25mm in the rear for that staggered look. I wouldn't want to do anything less than 15mm up front because then I couldn't run adapters, and I wouldn't trust 10mm spacers. The rears are a little trickier. I just want the face of the rims to be flush with the fenders.

Any thoughts / suggestions? Here is a current picture. Unfortunately the angle doesn't help too much with seeing the tuck, but I guess it's better than nothing.
https://cimg4.ibsrv.net/gimg/www.rx8...ddc4ce2775.jpg