petalas,

I love the 7100; I reviewed it for Secrets (http://www.hometheaterhifi.com) a while back. However, if I was in your situation, I would upgrade my speakers before adding an amp. I think you'll get better sonic results with matching front speakers than a bit of extra extension (particularly since the Klipsch's don't need much power to start off with).

My $.02.

-avi