I had custom rims made for my car and 19x10 was the most aggressive they would do knowing that the car will be driven daily. As seen, you can fit an 11" but you will have to do a lot of work to get them to fit (I.e. rolling the fender lips, negative camber, etc.).
My car with 19x10 rears with 275
Good luck on your decision and don't forget to post photos when done!
Cheers
Mark