With these classic Klipsch, you really don't need big power for great sound. Want to make people really scratch their heads while you stand back grinning? Get yourself a silly cheap t-amp. I have a HHLY that's 12wpc and only about h2"h x 3.5"w x 5"d. It sounds great and can hammer you out of the room if needed with my Forte IIs. With the t-amp and my modded Playstation 1 as cdp I have great sound at a total $137 in electronics!
I just got a SMSL SA60 class-D($80) that is 60wpc. (I know manufacturers can be a little optimistic when it comes to specs) So far I like the sound, and it is definitely more powerful. Its slightly bigger than a pack of UNO cards.
Some of these little amps sound amazingly good with Klipsch classics and for an almost giveaway price, they are fun to play with!