I'm probably going to go for a single 10, I listen to rap, but i don't need to have super super boom boom bass or anything, I'm just looking for a good bit of an improvement, nothing crazy.

In terms of sound quality, would you choose a single 10, or 2 8's, and by sound quality, i mean pleasant for some old boring person to listen to, not something that is going to sound like thunder. What I was thinking is getting a sub so I can let my speakers play the highs/mids, while the sub plays the lows, is this bad logic?