I have an AFE stage 2 intake on my '11 F-250. I really like it. Honestly, it made the biggest difference between all of the parts I've added. I got the dry filter setup since the MAF sensor sits right behind the air filter. At cruising speed it adds a little bit of a rumble, and when I put my foot in it, it adds a very nice growl. I wish you luck on your search.
2011 F-250, XLT, 4x4, 6.2, SWB, 3.73's, Stage 2 AFE Intake, Catback Flowmater, 5 Start Tuner.
Semper Spes, Numquam Quieti