I demo'd the R100's with my Cyrus 8xpd qx amp. I thought they were excellent, particularly in terms of imaging and detail. I would say timing was great if not quite as good as the spendor sa1's I was also demoing. It's amazing how much bass they produce given how small they are.
My only concern with them was that I felt they might be slightly on the bright side for my tastes with my amp. My comment to the dealer was that with a different amp I would most likely have gone for the kefs rather than the (double the price) spendors. I refused to listen to the R300's which I suspect would have had a better balance to my ears, as they are too big for my bedroom.
My concern for you would be that I have always found CA stuff to be a little on the bright side. I have not heard your specific amp but i worry it may not be the best combination, particularly for long term listening. That's only my opinion tho, and you may love the combination, so your best bet would be to demo the two together. Take your amp along if you can't find anywhere with a decent demo room that stocks both the kef's and the amp.
ALthough I think the speakers benefit from better amplification, I have heard them being powered by a Sonos ZP120 and they sounded great off that, so they don't need high end stuff to sound good.
Good luck and let us know how you get on.