Well I'm not sure of the input impedence of the Classe CAM-200's, if it's over 20K you should not have a problem. The BAT amps usually have very high input impedences, 100K or higher, which makes them very good matches with tube preamps.
That being said, I have owned a VK-31SE/50SE/51SE, and I also had a chance to audition the VK-32SE as well as the VK-3iXSE. I was not very impressed with the VK-32SE, I thought it's midrange was sweeter, but was not as powerful or dynamic as the 31/51SE's. I actually preffered the VK-3iXSE sonically to the VK-32SE too. The VK-32SE had more features, like polarity invert, balance control, etc. Personally, I would look for a dealer left over VK-31/51SE, a VK-3iXSE, or better yet, a ARC LS-26 over a VK-32SE.
FWIW, I see that Upscale Audio is selling brand new VK-31SE's w/ full warranty for less than $4K, here's a link:
Currently I am using a ARC Ref 3 preamp with a BAT VK-75SE amplifier, and I'm pretty happy with the results.