I would strongly recommend you staying away from the HTiB idea. My system took years to build up, it wasn't an overnight thing. I think that might be something you should consider. If I were going to recommend what to do on audio at least I would go ahead and try to get yourself a pretty basic AVR (upgrade later) and pick up a pair of Pioneer Andrew Jones speakers. If you've got some money left over a BIC F12 would be a nice addition, but I'm not sure the use you're going to get out of a sub living in a apartment. Might not be as fun to start out with a 2.0 or 2.1 sound system, but you'll end up with much higher quality equipment.