I don't think you need a lot of power for those, especially if you use a tube amp, which many seem to like with these Klipsch.
If not tubes, were it me, I would look at a good, 100 watt or so Class D amp, like the smaller and less expensive Wyreds or Bel Cantos.
I'd stick with my ARC sp16 for a pre-amp but I'm sure other good tube pre-amps would work fine.
For tube gear, I would be looking at some of the Manley products for good quality and value as well.
If not tubes, were it me, I would look at a good, 100 watt or so Class D amp, like the smaller and less expensive Wyreds or Bel Cantos.
I'd stick with my ARC sp16 for a pre-amp but I'm sure other good tube pre-amps would work fine.
For tube gear, I would be looking at some of the Manley products for good quality and value as well.