Just seeing what people had to say about the Sundown Audio X-10 1250W SUBWOOFER or RE AUDIO SXX 10D4 SXX SERIES SUBWOOFER Looking at running 2 jl 1000/1v2 with a obcon labyrinth 1.33cf per chamber
Sundown X is loud on the deep lows, not very musical sub, I would use it for rap, don't remember about the SXX but am sure is not so peaky or take as much abuse as the X.
I'd go with the Sundown X, RE has struggle to make a come back. Now if you are talking about the old sub such as RE MT, RE XXX, RE SX, RE SE are all worth the cash.