My dad currently has a bose sound system. I know it's not too great, I know eventually he is going to get an HDTV and get a progressive DVD player. The reason he won't change is just because it appears to sound good. What he is missing is the fact that there is better. Now I was looking at the bose booklet and the 'sub' woofer is 3 5.25" speakers ported!!?!? I was testing it out and there's barely any rumble and only at very high listening levels. I'm sure I can convince him to upgrade by getting him to watch LOTR and Godzilla. What would be a good sub for him to get in the price range of $300-$500. More than likely on the cheaper side. It would be fed 100watts. If I must, I'll even build him a box to save on costs.