I'm getting ready to buy one of those two and can't really decide which way to go. I'll be using the amp full range with a 2x10 and a 1x15 (both pretty efficient) per channel at the most...otherwise, a 2x10 and a 1x15 would each get their own channels. I don't care to biamp. At these power ratings, I shouldn't be able to hear a difference between them volume-wise (theoretically). I can see the argument for more headroom, which makes sense. Prepal.com suggests that the cost of used ones aren't that far apart (less than $40) which would drive me toward a 7000. Any thoughts on whether spending the extra cash for a 7000 is really worth it? 5000 owners, do you wish that you had gone for the 7000 instead? Thanks!!!