I have the oportunity to buy either a EVM 15L or a EVM 15B. Both are newly reconed with factory kits by pros which make them 400W RMS instead of 200W. I can only afford to buy one and I will build a suitable cab for it. It will (hopefully) be used as a stand alone cab for a 4-string bass in a rock/pop band (think: the Band, Bruce Springsteen). We don´t play really loud. Which one should I get? BTW Im playing with the idea of adding a 6" speaker for some more mids and highs if needed.