Probably not a popular opinion but I have owner a depth and dual Abyss subwoofers. The Depth is one of the best musical subwoofers I have ever heard. I have also owned a couple of SVS subwoofers and they are one of the top of the food chain sub companies for HT. 50/50 mix I would definitely lean towards the dual SVS subs. The Depth really doesn't get much respect around these parts, especially at it's MSRP price range.
"The bitterness of poor quality remains long after the sweetness of low price is forgotten"