anyone else who has mad the switch have any opinions on if the 7500 will be a worth while upgrade. I really enjoy what the 7125 has done in my system but would love to upgrade to the 7500 but reading some of the recent post about hum and grounding issues kind of has me a little worried. Right now my 970/7125 combo is dead quiet and trying to figure out a grounding issue to get rid of hum in my speakers doesnt sound like a fun proposition at this point considering that I will have to go through the trouble of selling the 7125 on ebay and losing a couple hundred bucks then paying $500 more to get the 7500. Any more input from some folks who have upgraded or just got a 7500 would help abunch in the decision makeing proccess. Thanks