Your idea is very similar to mine, except that I have no intention of building a large pedal board... I just zip it up and put slide it into the outer pocket of my gig bag. Fits like a glove. Then all I have to deal with is my 2u power amp and cab(s). Works for me. I am currently using the Aguilar Tone Hammer di /preamp and I like it. However when the VT Bass DI finally gets released I am going to give that a try. I have tried alot of preamp pedals over the years and those two along with the ART Tube MP Studio V3 are among the top contenders. As for a power amp, get one that is reliable and has a good sensitivity rating... like .775. The Crest Prolite has my attention, personally.