I am getting a Lakland JO5 and I am considering putting a pre in it. I have heard great things about the J-Retro, OBP-1, and Sadowsky onboards. I currently have an OBP-1 in my main bass right now so I am thinking of using something different, but they seem to be much more affordable that the other two. What are the benefits of the J-Retro and Sad.s over the OBP-1? Which would you suggest? I don't know much about onboard preamps, so I am open to more suggestions. Also, does anyone have one of these preamps that they don't want cluttering up their house anymore?