Hey guys, I've decided finally on getting a Carvin Legacy. But I can't decide on whether to get the combo or the head and a 2x12 cab. I've heard over time all the shaking in a combo amp can rattle tubes loose and cause other problems. But...I have to lean my 5150 combo back on a small box to be able to hear myself on gigs that we don't mic amps on. With a head sitting on top of a cab how would I be able to do this without knocking the head off? If I don't lean my amp back then it blasts the crowd and the sound mostly hits my calfs and knees and I can't hear myself that well unless I lean down past the cymbals towards the speakers. Of course you can't play a gig all night like that. hahahaha Also, would there really be a sound difference in having a 2x12 combo as oppossed to a head with a 2x12 cab? My band is loud, but not ear bleeding loud at our gigs. I would go with a 4x12 cab that has the top two speakers pointing upwards, but I'm afraid that would be overkill for my situation. What do you guys think would be best? Thanks, John R.