Rockford Fosgate 300 x 2 with Polk Audio speakers and line leveler. That's as simple as you can get. Sounds as good as buddies more expensive set up. I will leave brand names out as I don't like smashing other manufacturers but was able to put something together without breaking the bank. Now keep in mind, mine is a 2014 SG so don't know specifics about flashing and tuning on 2011. 3 different friends with 3 different manufacturers all say they wish they would have gone the route I went. Now to be honest it isn't by any means comparable to a 800 - 1000 dollar set up but for around 300 to 500 you can't go wrong in my opinion.