I'm super tempted to do just that. I just really like the DB level on this thing. My last bike (DR350) had a Q4 setup and was still way too loud for me - I couldn't talk to my buddy next to me with the bike idling. I dig the stealth factor too - in the past I've ridden some local areas that are probably frowned upon. Also, I just figured my MPG and it came out to 71!!!!! So I may not need a larger tank for quite a while.
I've added the PMB rack and dialed in the suspension - shock at lowest position, sag at 105mm and clickers all about in the middle. So far liking everything except for some jerkyness off idle - have to get used to the EFI.