When it came time to buy my exhaust for the 240 I wanted to go with a reputable exhasut such as Blitz or Apexi, but when that time came .... no money. But i had to buy one because the old stock exhaust was shot. I bought some Pasesetter headers and went 2.5 inch pipe straight back to a Ravin Z-33 muffler. (
www.goravin.com) I'm guessing that not to many people have heard of it .... well thats because (I hate to say it) I bought it a Midas. It was cheap and not restricting at all. Now, I can set of alarms from a street over and when I pull up to the line, I'm told that you cannot hear if the apposing car is reving there engine or not.

Even those little honda's with a huge cannon of a muffle cant be heard.
For me its the best thing. The muffler doesnt look all that great but my 240 is a little rough around the edges too. A sleeper you can feel leave the line. My latest victums have been Cameros, and i love seeing there facial expressions change when I bring the rpm up to 4000.
My thoughts on exhaust is to get whatever you want but make sure its wide open.