Since you are using 3677s up front, get the JBL surrounds and don't worry about the Deftechs. In fact, I would step up to the 8340s so you have compression drivers in all your speakers - you can get them for significantly off retail if you call around - won't be much more than your 8320 price.
I strongly urge you to reconsider that jbl sub. It is down -10db at 28hz; that is terrible performance for a subwoofer.
Last edited by Davecraze; 08-16-2014 at 04:57 PM.