Is this ok or not? I have a 50 watt plexi that I wanted to match with a Celestion loaded cab. I was talking to the guy at Avatar cabs and we decided that the Greenbacks were best for what I am looking for -- but a 212 cab with 2 greenbacks is 50 watts. Is my amp head a mis-match because its 50 watts? Meaning shouldnt the cab be greater wattage than the amp? The guy at Avatar did say that he thinks it will be fine -- he does this for a living so I take his word for it -- but what am I missing here? Can I possibly put too much strain on the speakers and ruin them after one year or something?