It all depends on what you want. Exhaust is a totally subjective mod! What one guy likes, another will think is horrible... You just need to hear a few different exhausts and pick what you like.
Personally, I like it loud, but not drone-y. I like the old SLP exhaust that used to be available for the B cars. I very much dislike the Flowmaster system. Hate the Borla. Like the Dynomax and Hooker exhaust for our cars. But I LOVE the 3" exhaust with Summit Turbos and dumps on my SS. I love the Summit turbos in the stock pipes with resonators deleted and ridiculous truck tips on Morticia. I loved my 2.5" exhaust with Dynomax Bullet mufflers and turndowns on my Caddy. I HATED that sae exhaust with tailpipes on it though (that I HAD to add to pass inspection
). I also loved the 2.5" exhaust with no mufflers in the stock location and Summit glass packs in place of the resonators that I ran on my SS. It was LOUD and OBNOXIOUS and I got lots of positive comments on it. I also got thrown out of NHIS in Loudon not ONCE, but TWICE because of it!
So I added a pair of Flowmasters in the stock location so I could race it and NOT get kicked out and absolutely hated it. That's the exhaust Bill just bought yesterday. He'll love it.
So like I said... Exhaust is VERY subjective. Come to one of the meets, or better yet to the track, and take a listen to each car and decide BEFORE you spend your money and end up not liking what you got...