Really? I heard that Rockford is really high quality products. Thanks for your input.
I don't know much about that sub, but just by looking at the power range, I would rather go with something else. I like Alpine, because it's what I'm familiar with. For $90 +shipping on Ebay, I much rather have the Type-R 10". The Type-R is 500W RMS and sounds sweet. Of course, you'll need more juice to push it.
I'm sure there are pleny other choices as well. I hope you get more responses.