I am considering getting one of the lightweight heads. I currently use an ampeg pro 4 and I really like it, but I am sick of carrying it to gigs. I messed up my back a few years ago and to pick that up with a road case on top of my stack isn't fun. ha ha I have a gk 410 cab and gk 115 cab. Will any of these lighter weight heads compare to the ampeg pro 4? I mostly play heavy music and the band plays pretty loud.