Ok guys, I calibrated my system as recommended above. 950 test tones Vol @0, RS Sound Meter weighting 70 C/Slow Response and readings of +5 (I should say that the RS meter reading was fluctuating as much as +/-1; I settled at what I felt was closest to +5).

Here are my new channel settings:
Magnepan 1.6QR fronts = L+7; R+6
Tosh 65H82 Spkr Center = +3
Infinity HT10 surr = L+2; R+2

(Wasn't sure how to calibrate the sub, so I put it at -6). Happy to notice that there was no hissing from my speakers with the new settings.

I played a protion of Monsters Inc DVD and I felt that volume level between -2 and 0 on 950 dial was about right. I will try other dvds over the weekend and will post my findings.

Thanks for all the feedback!

-4HT