A lot of great responses, pony up a few more and go with this and cease all doubts
For $429 plus shipping you just really can't beat the PB-10NSD from SVS. Just a little looking around at the reviews (both professional and consumer) and it goes without being said. I have the DLS-3750R from Velodyne (the little brother to the one you mention) and to be honest it is a good sub, but had I a choice I would go with the SVS without hesitation. I know it is a little bit higher than what you mention but not by much and you simply can't go wrong. As far as the L-C-R speakers go that is a whole separate ball game. The best advice is go out and listen to as many different speakers as you can from as many manufacturers as you can. Narrow it down by what sounds best to you. Pay attention to what they are hooked up to and where (how the room is designed) they are and see what seems to give you the best felling of what sounds "Right" to you. All of us like a little different things. Some people love Klipsch, some people hate them, as a lot of people think that they are too bright and edgy in the treble area due to their "Horn Loaded" tweeter. I have one for my center only in my bedroom so I can hear the dialog clearly when the volume is still low. Sorry rambling here. But really, go out and listen to as much as you can. Don't be afraid to listen a little above what you want to spend. Sometimes that extra little bit of dough will take you to another level entirely. Good Luck!