For $1K, I'd still head over to SVS and take a look at their complete packages, since even with your discount, you probably can't put together a better system than what you will get from them for that price. Since you get the receiver at a discount, wait another month and get one of those packages with your reciever - you won't regret it. $500 is a lot, but I see spending $200 on a sub that isn't nearly as good as a bigger waste of money in the long run. You can buy a partial system from them, like the sub and mains, then add the rest down the road - they usually give a repeat customer discount (they used to, not sure about now).
There are other manufacturers out there who offer great deals as well.