Hi everyone, just registered to the forums! I've been using this site for a years now to get all kinds of ill-informed biased reviews!
Just kidding!
Now I'm asking for some help.
I'm looking for a subwoofer to fill out the bass in my home setup, but I have some very strict guidelines. I am looking for opinions/recommendations of subs I could use.

First off, Iive in a small condo, about 680sq ft. The living room is roughly rectangular, about 10' wide and 20' long (28ish if you include the kitchen at the far end). Walls are drywall over concrete on one side, drywall on metal stud on the other. Floor is laminate on concrete, ceiling is stucco on concrete. One end is kitchen the other is all windows. That's the end my mains are at.
So not the easiest room to set up aurally.
I'm looking for a small sub that doesn't take up much space (because I don't have much room) and won't get me in trouble with the management (much) but still puts out noticable full low end. I rarely watch movies, and though I have a surround setup, most of my use is for music (and some gaming). I listen to all flavours of music, but I like funky, tight bass whether it be found in Jamiroquai, Lee "Scratch" Perry, Rush, Daft Punk, Beastie Boys, or anything/everything in between.
I've got a NAD 752 reciever which I'm really impressed by and generico/no-name speakers which for the price, I'm also impressed by. (My PSB Century 300i's just weren't cutting it in this space, nice as they are!)
My budget isn't huge, $500cdn is my cap.
I'm also in no hurry and can wait for a good deal to pop up.

So to sum up: Seeking small unobtrusive musical subwoofer of my dreams, for listening to music and long walks on the beach.

I should note, though I lurk audiophile places, I wouldn't characterize myself as one. It's cool as hell if you can hear a pin drop from 200 meters on your system, but why would you want to listen to a pin drop anyway?