I have the Bassani witch cost more than the BTG but you can quiet it down with a baffle that takes 5 minutes to take in or out and they stand behind what they make. My baffle started to look a little rusty so I contacted Bassani and they sent me a new one and it didn't cost me a dime. Even sent it 2nd day air.
I got mine from these folks they are the cheapest
http://www.raceandstreet.com/ptexhaust/