Has anyone tried either the 250 or 800? Thoughts? I'm looking around at some different heads and portability is definately a concern of mine. I'm never happy about packing an 80 pound head only to have to go back to the van and get a cab. I like the ampeg tone quite a bit, any reccomendations on similar heads in around or about the same price category? Since these amps are fairly new I assume a used one would be difficult to find so I'm keeping my eyes open at used higher end amps as well but there are no stores close by that I can try different amps out at so any help would be appreciated.