Using a home audio receiver isn't what I would consider "serious listening", but to answer your question, you won't go wrong either way.
I have 4 subs in my main system, 2 are Rythmik, 2 are SVS. They're both great subs.
I have 2 small systems in small rooms like yours. One has a Rythmik F15 and the other an SVS SB-12 NSD. If I had to choose, I'd go with Rythmik, but the SVS subs are very good and a little more bang for the buck.
While I'm a proponent of multiple subs, you should be fine with a single sub in a room that small. I'd go with a sealed sub.
I have 4 subs in my main system, 2 are Rythmik, 2 are SVS. They're both great subs.
I have 2 small systems in small rooms like yours. One has a Rythmik F15 and the other an SVS SB-12 NSD. If I had to choose, I'd go with Rythmik, but the SVS subs are very good and a little more bang for the buck.
While I'm a proponent of multiple subs, you should be fine with a single sub in a room that small. I'd go with a sealed sub.