I am going with an Eclipse 5444 h/u, and stock speakers in my civic si hatchback. I am planning on running a jl 500/1 amp to power a single 12" (possibly 2 12''s). I am making a custom sealed box for the sub/amp. I am looking for good thump, but don't want to lose too much quality. I was about to buy the rockford 12" at a local shop, and all the sales guys were telling me that the memphis 12" dvc would blow the rockford away. Of course they didn't have any set up in the shop, so I couldn't check them out. Anyone have an opinion on this? For $150 less than the R-F, the Memphis would be a great deal.