compact poweered subs

[dib]

hi - I am considering putting a compact powered sub in the rear compartment as it seems to be the only remotely affordable option for now to get some bass in there and was wondering if any of you have installed any of the following in your x5's:

blaupunkt thb200a
kenwood ksc-sw10
boss bass600

or any other similar powered subs that are compact enough to fit in the rear compartment..?

if you have - please post pics of your installs and let me know how they sound (what kind of music you listen to would be helpful too - I am across the board but I mostly listen to r&b, hip hop and deep/progressive house)...

thanks...