You could always move up the Von Schweikert food chain. I was going to suggest the VR-2 but then I checked out Audiogon and saw a pair of VR-4's for $1495, they usually go for more. You may not even need a sub with the VR-4 and they would integrate perfectly with your existing center speaker.
There is usually plenty of VR-4's to choose from on Audiogon so I would find a pair to listen to before you buy. You save on shipping and also make sure they were not abused (and they still work).
Wayne