I am getting back into playing bass at church and some other places. I have two old JBL 15" with a horn p.a. speakers. I want to get a home amp. Can I just buy a head and use the cabs for a rig or should I just spring for a combo(I have a peavey in mind)? I have asked around and keep getting mixed messages. Either is fine with me; I just don't know which one would sound better. I play soft rock and mellow songs at church, and then some 50's rock other places. Sorry for the noob question, but I would appreciate any advice on the choice.