Mike N., reread my 2nd post, I believe all your questions are answered there. Also, look around for a used SVT exhaust as a good starting point.
Nick,
I got the 12" Bullet Muffler from carparts.com, but I don't think they sell them any more.

It is stainless and it only ran about $55. My thoughts: Because you have no cat, try out a longer muffler (about 14") to use as the middle muffler and try it w/o the Flowmaster. Do I think it will sound better w/o the Flowmaster? Yeah. Try it, and let me know what you think!