I was browsing through the Musician's fiend website the other day, and saw that you can buy the Marcus Miller preamp by itself, for something like $40. Does anyone have one of these? It seems to me that the first thing MM owners do is swap out the preamp. Still, I've been thinking of dropping a two band into my fretless but didn't want to spend a wad-o-cash. In comparision, the Aguilar is about $50 more, but do you think it's worth it?