The 800RB was one of the best amps for the money I ever had. It just had twice as many knobs as I ever needed and a bunch of bi-amp features I never used. The LMII replaced it for a while, but there was a certain kind of squished mid scoop sound I could never seem to dial out of it. So that left and the 800RB stayed, I just sold it when I figured I could probably find something just as good, but louder and lighter. If GK made an amp that was a 500W version of the 800RB, without all the extraneous bi-amp stuff, I would have it. Even at the same weight/size.