Why not try it out with just a downpipe first? Drive that for a few months and if you're wanting more noise then purchase a catback exhaust. The catback install is very easy to do with some jack stands and a basic socket set. This route will make it easier on your wallet as well.
Regarding tuning options? I had Torqued Performance and Eric's service was phenomenal. There are a TON of dyno's floating around and his tunes make great power and are awesome when it comes to driveability. Check him out!