My Hartke HA5000 has died on me. Hartke is sending me a new one, but I don't trust them anymore. So, I need a new amp. I'm considering a G-K 2000RB, but I've heard a lot of horror stories about them. Is this head worth the money? I've been thinking about getting a Crown or Crest power amp and separate preamp, but I have not been able to find a preamp that has bi-amp outputs. Does this even exist? I'm using an Ampeg Classic 1x15 and 2x10, and I need something that will produce plenty of volume (several clubs around here only use the PA system for vocals) and stay very clean. I definitely prefer a bi-amp setup. And before it's suggested, I've tried the Ampeg SVT-IV, and I don' like it. Call me a heretic, but I just don't like that preamp section. Thanks for any help.