What version of Audyssey? Previous versions left me unhappy at times with other speakers, but XT32 does a great job IMO.
As far as the sub, if Audyssey has it set at +1 now, I'd not go to +11 (+10db) at this point. You need audyssey to initially set the sub around -7 to -10db upon completion, so when you boost you are around 0.0 in the AVR menu.
Both my VTF15's are set around 9 oclock, and when Audyssye completes they are around -7.5 in the menu. I then go in and adjust to +2.5.
The 10db boost comes straight from Chad B, who is calibrates both video and audio, and does Audyssey pro calibrations. Ive been so much more happy since boosting 10 db's.