I am mostly a double bassist but am getting back into BG playing after a long layoff. I have a nice music room at home where I practice, and the centerpiece of it is a nice recording desk with rack rails that holds my recording gear. It also has a monitor bridge with a pair of decent powered monitors and a rack mounted mixer. To facilitate easy practicing along with recordings and drum samples, I'd like to add a decent rackmount bass preamp ( possibly including some basic effects) that I can patch through the mixer. I've been out of the loop on this kind of stuff and know about basic stuff like the Sansamp RBI, but I'm sure there are a lot of other options out there that might serve as well or better. What are some of the other options for this kind of function? My only requirements are that it should be one or two rack spaces, and that it not be insanely expensive. Also, would also be interested in a similar guitar unit for the same purpose. Time to dust off some of those old instruments and have some fun. Thanks in advance!