howdy, I plan on buying a korg pandora because I live in an apartment and my 10 watt practice amp is giving me a bad reputation amongst my fellow tenants. I'm having a hard time choosing between picking up a px4d from musiciansfriend brand new or scoring a used px4b off of ebay. In your collective experiences, should I stick to the one that was designed for bass, or get a newer model? Is there anything that makes the px4d LESS bass friendly?