I am looking for a pre amp and since I'm not in a band right now or have any plans to be in the future one of my main concerns is versitality. I really don't want a box full of modeled sounds or something uber complicated. I saw a good deal on a Sans Amp RBI on my local C's list. These seem to get great reviews, but every clip or demo I've seen of these in action is getting a grindy rock sound. Do these things do old school R n' B. How about modern and clean?