First of all... Welcome to r-f! I have a magnaflow catback on my truck. 2.5" single in with dual 2 1/4" out to tips straight out the back. It is a very nice, beefy, manly sounding exhaust. Minimal drone on the highway, quiet around town, an awesome deep growl under throttle. I highly suggest magnaflow.
Basically the choice is yours but I will recomended you find the LOOK you want with your exhaust then worry about the muffler because it is very easy to change if you don't like the sound