Keep in mind that Rhyno is comparing 250 w/ch to 110 w/ch so naturally the bass will be more robust with higher wattage. I have owned the 2500A and liked it very much nice and detailed with very good bass control I was driving thiel 3.6's with it. I would also suggest that when buying used that you make sure you are buying / comparing the CJ "A" model as it is a substantial improvement over the non "A" version. Much more detailed in the mids with better high end extension. I can not comment on the belles as I have not heard it.
Chuck
Chuck