I've a witnessed a number of Audio by Van Alstine preamps and amps in use, and I can vouch for their quality. AVA makes electronic gear with the lowest noise levels I've known. I frankly doubt if anything else is better, regardless of the price.
Did you consider the
AVA Transcendence 10 preamp, at half the price of the FET Valve CF preamp?
I suggest you speak to Frank Van Alstine and ask if there are any issues or problems with using his preamps with your amps.
I haven't heard any of the Rogue Audio products, and can't comment.