You might consider the cool running Consonance amps from Opera Audio. These received rave reviews and much attention at the recent Consumer Electronics Show.The 80 watt version will work nicely but if you listen at loud levels the 100 watt amp is a safer bet with your 86 db sensitive Proacs. The Consonance amps are similar to your Proacs in that they provide good detail, clarity and excellent soundstaging.They are a great mix with tube preamps.I understand your energy concerns as I also live in Arizona. Using an excellent power cord such as the Sahuaro Audio will actually reduce your amp temperature 6 to 12 degrees. Another suggestion is to run an overhead ceiling fan on low to add cooling. This should not degrade your sound quality much if at all. All of these products are in the middle to lower end of your price range. Overall, you will find the Consonance amps to be much more natural and musically involving than many of the amps mentioned.You can contact me for more information.
AudioLon
AudioLon