Opinions on New Exhaust Parts

[lgvl]

I've been putting together my list for a new exhaust and was hoping to get some opinions. I'm replacing the manifolds back on my 82' C30 454, i'm looking for a little more power and a sound that won't wake the neighbors but still sound good. I will be installing the headers but will have a local shop do all the pipe installation. I was planning on having a dual 2.5" exhaust installed but am open to any good reasons on why to go to 3".

Thanks guys, appreciate it.

So far i'm thinking:
http://www.jegs.com/i/JEGS-Performan...00112/10002/-1
and
http://www.jegs.com/i/Flowtech/387/5...oductId=744861