Vossen's set up is great with their 20x10.5 in the rear however, I ran a 305/35 and I rub slightly but mellow would be right in the 305/30, it wouldn't stick out as much. Hankook makes a good set of tires at 255/35 for the front and 305/30 in the rear.
We run Avant Garde on our 13 Boss but its a square 19x9.5 setup, AG is still getting into the Domestic scene so their offsets, colors and sizing are a bit limited... but they're getting there, I've talked to them a few times and they plan on doing more. Take a look at acealloywheels.com
and look at their new 2013 lineup both the Mesh 7's and convex are pretty nice. I test fitted the 19x10 square setup for them to make sure they fit the brembos and they fit perfectly. With the new Ace wheels this year I've sold a bunch of sets, they're very nice. Here are a couple pics of the AG's, Vossens, Forge stars and Ace wheels. I did this in hopes that Mellow yellow shows you some of his pics, lol. But hopefully this will help you out a little on some choices.