I went with a different approach than most. I went with a 2 into 1. I originally ordered the V&H Propipe Chrome, but it was back ordered 3 different times, so I changed it to the V&H Propipe High Output with is a black exhaust with a chrome end cap. It has a 4" outlet and at normal driving speeds it sounds nice, just a rumble that doesn't overpower the music. Crank on it and it sounds fantastic. It actually comes with 2 sets of O2 bungs and plugs for them. I went with the SE 255 Cams, V&H VO2 air cleaner and PC V. I ordered the auto tune for the PC V and it is supposed to be in tomorrow. I think it looks really nice and the ProPipe HO is less than $700 which is much cheaper than most full systems that gets rid of the cats. The 2 into 1 is not a cheap way to go, but neither are new head pipes and slip-ons or a tru dual system. Lots of good choices out there, just make sure you specify it is a 2010 as the 2009 systems are different (different O2 sensors/location).