Hi everyone thank you a head of time for you imput. I have a GK400RB head, 2 aguilar 112 cabs and a Hotwire big apple 5 bass. I like the sound I am getting very much and I like the attack and punchy raw clean tone that I am getting, but my GK400 does not have enough head room. I have a friend who will sell me his Mesa M-2000 head, only used on 10 or so gigs and on 9 months old for $800. I am a little turned off by all the options and don't know how I feel about owning a tube amp and needing to deal with replacing the tubes and all that. I guess my question is, bassed on the tone the I want to get crisp, punchy, raw and clean tone I am trying to get is this a good head for me? Is it a good deal? What else shoud I look at? (I am thinking about staying with GK and going with the GK1001 or going for a seperate pre and power amp) Thanks for the info.