Two totally different amps in almost every aspect. I'm talking about the SWR SM-900 and the EBS TB650. Played both today, side by side, and found this. SM-900: IMO best solid state head I've found that suits my style/tone. Great EQ section and plenty of power but still has the solid state kind of flat sound. However, SansAmp RBI fixes that right up, or helps it out a little. Plus, it's probably gonna require a little less maintenance and headache since it's solid state. TB650: I've never played a tube head before. I know ***? right. But I did today and I know now what everyone raves about. This thing sounded killer and suited my tone really well. But from what I've heard it's going to annoy the crap out of me dealing with tubes and luggin it around. So I'm torn. Worry about buying tubes and carrying this heavy head around, or buy solid state and fix it with a pre. Both sound awesome and there's not that big of a price difference. Another question, this being my first tube head experience, I need some suggestions on others to try. No Aguilar, I'm not robbing any banks to buy gear. PLEASE HELP.....I'M CLOSE TO MAKING MY DECISION AND THIS CRAP HAS BEEN GOING ON FOR LIKE THE LAST YEAR. SOMEBODY HELP ME PULL THE TRIGGER. thanks.