Anyone online know the difference between the two? I am in the market to possibly get one on ebay, but don't know which one I should be looking for. I'm sure either one would be fine, but does anyone know of any pros/cons?

I believe the only difference is that one had an addition set of RCA video and audio outputs, can't remember which one though

I went back to the pioneer website. It is the 5700 that has the extra set. Thanks for the input. That answered my question.