I wanted something to put upstairs once I move the Caps downstairs. Right now I have the empires downstairs and I have to say I'm very impressed with the sound quality!
I actually wasnt planning on buying anything, but a set popped up locally and was awfully tempting. These are great subs for the money.
Counsil has 4 Empires and 4 Submersives and he told me that from 30ish hz up (not positive about the exact number) an Empire is very similar to a Submersive both in output and sound quality. Nice find.