Go to Best Buy and go in the Magnolia room. I went with a Denon Receiver and Mirage speakers. For sub I did the 12" Klipsh. Its way more than I needed, but with everything, it is always nice to have overkill than be disappointed. Bjorns has some outrageous stuff BTW. Don't forget to have good quality wiring and Sub cables. They are a lot of added expense as well.
--2013 CC Z71, Edelbrock charged, cam, long tubes, 4.5" Zone, 285/70/18 KM2s on Gear Big Block, Kenwood system, LineX, Retrax, Katskinz, NFab.
--2012 Dmax CC Z71, Cognito UCAs, braces, Fox 2.0, LineX, Nfab, Retrax, Ranch Hand Front/Back, Custom Katskinz, Black Gear 18x9 wrapped in 285/70/18 Toyo MT.