I used a McIntosh MA 6900 to drive the VR2's with splendid results. A used one is still more than you want to spend but the MA 6500 is in your price range. I would think the NAD you have would do the job--are you sure you might not want to consider a source change instead?
Integrated to match Von Schweikert VR-2
I'm a total neophyte with Von Schweikert VR-2s currently using NAD C541i and C320 BEE,looking to upgrade. Any thoughts on an integrated compatible with VR-2s? I'm looking to spend not more than $1500 and thinking of a Portal Panache demo. Thanks in advance to any responders.