This is fun and is what I did. I got a deal on a bunch of subs (now have kickers in, but have also run Polks) so, I went with the Zenclosure that holds two since I had more subs than the Russian Navy.
I love bass in a variety of music (contemporary urban, funk, classical, rock) and though it is definitely overkill (on 10" or 12" is more than enough) it makes me giggle and my wife's boobies jiggle and it is easy to dial back when appropriate.
Box was $130 and I got a 900 watt (rms) amp on eBay for $125. I have a speaker cover made from speaker fabric and when the hatch is closed, you cannot tell that there are subs in the back unless you are really attentive.
You can also have fun mounting a dial-a-funk boom-boom bass knob.