I'm not familiar with the Ayre, but I powered my WP7's with a Music reference RM200 tube amp without a problem (actually made magical music just not Lamm magic) So the 92dB 4ohm load WP7's don't require a ton of watts, just quality current.
The JC1's are nice sounding but require serious breakin 1400 hours +. They have tons of current but only 25 watts of Class A bias.
Other conventional Mosfet design should work also quite nicely: Pass Labs, etc..
If you want the bomb to mix with your WP7, get yourself either the M1.1, M1.2, M2.1, or M2.2 be warry as these generate tons of Class A heat and an addiction. (Big VTL tube amps also sound amazing if you want full tubes)
As much as I think Digital/Ice technology is amazing, I think it has a ways to go, and regardless of all the H20 hype use their money back trial to find out what works for you. Don't hold your breath, the H20 has been raved about with conventional speaker (I haven't seen any wilson owners using them on agon or audiocircle to recommendations) If someone wants to bring a pair to Scottsdale,Az to compare, I'll supply the beer!