Andrew, I don't know if you are still thinking about what to do with this amp, but two Janis subs were just listed (no, not mine; I just bought another a couple weeks ago) on eBay. I don't have mine yet, although I'm planning on trying it out on my SVS 16-46CS+. This should be a real test of the amp. If you'd like I'll pass on my findings....
-Aaron
-Aaron