Ok, here is my situation, I'm currently using a '91 GK 400RB into 2- Peavey TX410 cabs... I play a Warwick Thumb BO 4-string bass. The band I'm in uses amp stacks on stage (guitarist has a Marshall Tube Amp with 2-412 cabs). The problem is that the rig I have is getting tired and not keeping up. So, I'm looking at one of the famous Ampeg 810 svt cabs and either a an Ampeg amp or a GK Mb 800... Any opinions? I do play slap bass as well as finger style .