First of all I think you are misinformed about to much power. Most speakers are damaged from to little power because the amp is sent into clipping which damages speakers. Keep in mind that you have to double your power that you have now to get any noticeable volume change. More important than the power rating is good clean power and that is especially important with horn loaded speakers. My suggestion for an amp would be a used Aragon even Klipsch likes them they bought the company. My first choice would be used Plinius 8200 but it is about twice the money you want to spend. I don't use any thing but tube amps but I use fully horn loaded speakers and it is a good match. In your case with the new style klipsh I think SS a better match. My feeling is that is that if you want to do it right but conservative save up about 1400.00 and I would go with a good integrated like Plinius 8200I, because to many times amps. And preamps. make a poor interface, with an integrated their made for each other and from my experience that leads to great sound in a reasonable price range.
Amp suggestions
I have a pair of Klipsch kg3.5's. I have had an adcom 5400 on them at one point. I have $400-500 to spend on an amp. I was going to get an adcom 555, but I'm finding out that may be too much power for the speakers I have. I had a tube amp suggested to me, but I'm not sure I can go that route. I'm using my yamaha receiver as the "preamp". I really like volume, I usually listen to alternative/hard rock. So I'm not sure I can get a tube amp that would be loud enough for my price range. Aslo, how would a tube amp blend with the other 3 speaker while watching movies? Are there any other ss amps out there that someone might suggest other than the adcoms? Ones that might not have quite so much power, but would sound better on the horns. Thanks for the help.