I am about to purchase a power amp to go with my Ampeg SVP-PRO pre-amp. I'm thinking Carvin DCM1000, DCM1500, QSC RMX1450, or QSCPLX1202. I have 1 Hartke 4x10XL (400watts), and a Hartke 115XL (200watts). I currently use a Hartke 3500, and plan to use this for a practice/backup amp. I'm not sure how much watts is ok to put thru these cabs via these powerful amps. Is it ok or better to use a more powerfull (say CarvinDCM1500) than say the DCM1000? Also, which is better-running in stereo with one cab/channel? or getting a lesser powered amp and run bridged? Is there something special about the QSCPLX seies other than weight reduction that makes it worth the $? Doing small to medium indoor gigs and an occasional outdoopr lawn picnic, I'm thinking the Carvin DCM1000 might suffice. Any thoughts or experience would be appreciated.