On paper the Helicon does not appear to be an ideal match for a tube system. If you are dead set on tube amplification, I know there are better candidates for speakers within the same price range. As I recall, Cary had a 120S powering Helicon speakers @ RMAF 07 and it was nothing special.
OTOH, if you are dead set on those speakers and amps, I would go with the Cary since it offers more power.
OTOH, if you are dead set on those speakers and amps, I would go with the Cary since it offers more power.