I have an emergency situtation. My amp blew. We have a gig tomorrow night, and I don't have the cash yet to buy a new rig by then, but my guitarist has offerered to purchase a head for me, to be paid back later. He already has an older 2x 15 fender cabinet, with JBL's, but i don't know the OHM's rating offhand. What head to you suggest I purchase to go with it? We are a classic style rock band, and I have about 500 to 700 to spend. I would seriously appreciate any suggestions. I was thinking first about the solid state ampeg. I will be using my P with flats and mostly my J with Roundies.