D&D is in Texes. That should be a plus for you.
Two big conciderations for D&D.
1. They are price competitive.
2. There is a free PC3 map floating around, specifically for them.
Holeshot (very popular)
1. A little quieter, if you buy the street baffle version. I have not put them side by side, but own the D&Ds and have ridden with a couple Holeshot bikes before getting the D&Ds.
2. There is also a free Holeshot map floating around.
Once you put on the cans, your gonna want the power commander to smooth things out an take care of decel backfiring and get to the power you just tapped. A free map may save you a couple hundred bucks of dyno tuning.
I have not seen maps for many other brands. I definitely have not seen any for Staintune.
(although one of the available maps may work fine, it is a crap shoot, or if you post someone might send you one)
Other players:
Two Brothers has the best looks.
link
Muzzy sponsored the EOM and donated a set of cans. That makes them a great supplier.
I seems they took care of everyone when they miss fired on the pipe bend of the gen 1 full system.
Got to like a company that takes responibility.
Leo Vince
Blue Flames - already list above, have great looks.