I just bought a Brinsea Octagon 20 Advance EX on ebay for $315 shipped (after bing/ebay bucks and a shipping rebate from the seller). I can't wait!! I still have my hovabator also for overflow.
I love the brinsea mini advance. I've had mine for about 6 months now with very successful hatches. I also use it to isolate young chicks that are having problems the first few day's after their hatch. It's a gr8 size since I have city chicks, but I also use my hovabator 1588 for larger batches (when needed)
I'm picking up a Brower top-hatch incubator tonight - have no idea if it'll be any good, hope so though. He's giving me 8 Australorp eggs and 4 Americauna eggs too! Paying $125.