Congrats! Great speakers. I've had them for ~2 years now....
While these speakers are pretty efficient, they can handle extreme power (Matt Waldron once told me you could plug them into a 15 Amp outlet and they'd output 130+ dB of 60 Hz!) I have run them on Proceed HPA's, Mark Levinson 433 and now use a Krell Evo 403 and they keep liking the increased power. You could use tubes as well as I've heard them at several shows on tubes, but they still tended to be pretty powerful (think the Butler Mono blocks)
While these speakers are pretty efficient, they can handle extreme power (Matt Waldron once told me you could plug them into a 15 Amp outlet and they'd output 130+ dB of 60 Hz!) I have run them on Proceed HPA's, Mark Levinson 433 and now use a Krell Evo 403 and they keep liking the increased power. You could use tubes as well as I've heard them at several shows on tubes, but they still tended to be pretty powerful (think the Butler Mono blocks)