I'm just wondering if anyone has used the RH450 for upright? I play lots of different styles on upright and electric but mostly reggae, jazz and R&B and I'd like to be able to get away with just using one head. Also, I'm thinking of using the RH450 to replace my GK400RB. Any thoughts on the comparison between the two? The RH is rated at 450 watts and the GK is 280 but I find it hard to believe that it's going to be almost twice as powerful. I'm running into a TC RS210 and/or an Ampeg SVT15E. Any thoughts would be greatly appreciated!