Okay, so there is a guy on another forum selling a Marshall JCM 800 bass series head from the 80s, real cool. Its 100watt and i hear it plays very nice. Anyway, He's offering trades of roughly the same value. Now my question is, I have a Marshall vba 400 which I love and imo is as close too an SVT without actually being one (I like this kind of tone for what I play), but should I ask to trade it for one of these rare beasts or should I keep my current amp?? I hear the low end isnt great on the 800s, and 100 watts isnt all that loud for bass, However he's also offering a matching 4x12 marshall cab with it and I already have a 600 watt 2x15 that I play through. I play mostly rock, hard rock, classic 'metal' & some bluesy funk stuff too occasionally...but im mainly a rock bass player. I enjoy my low end that i get from my amp and cab but like high end and play with a fair amount of treble and like the odd EQ pedal. So my preferred sound is very Balanced in that respect. Should I swap rare for rare or keep what ive already got?? Anyone had experience with both of these amps? Thanks!