Subwoofer Help.

[kev1244]

I am in the market for a subwoofer (first time).

Here is my current system.
Denon receiver (3 years old), I am assuming it has a crossover.
2 bookshelf Energy Loadspeakers C-1 (Fronts, usable bass response 50 hz)
1 Energy Center Channel CC-1
2 bookshelf Paradigm Titans (Rears, usable bass response 60 hz)

I mostly want the subwoofer for great and accurate music, but I also want it for movies.
My budget is under $500 including monstersub cables.

Attached is a jpg showing the layout of my place and the solid rectangles represent the current speaker placement.

Currently I have been looking at:
Energy 8.3, or 10.2
Klipsch KSW - 10
SVS PB10 - NSD (turned off by shipping costs only)

Thanks for reading
I appriciate any help you can provide.