The Tripath is a nice little amp. I have a coupe of small Lepai amps that are similar that put out 20-WPC. With 95-db efficiency you will be able to achieve room filling volumes of 75-85 db with less than one watt, with your Klipsch towers. These small amps put out some good watts considering their size and cost. You should be able to achieve 105-db without taxing the amp. I have not personally listened to the Tripath but, with the Lepai's they will be clean to a little over half of their rated output, then they will start to distort.
The Tripath, together with the Klipsch will provide you with surprising good sound with a minimum investment. Just don't expect to open up a dubstep dance club in your living room. Then again, they might even be ok at moderate levels.
I use a 50 watt (per-channel) amp for my rear Klipsch tower speakers that are about 90-db or so. The front towers are powered by a 250 watt stand alone amp.
While your Tripath will fill your needs for now, keep an eye out on eBay for a Sherbourn LDS2/75 (Sherbourn has now been folded into Emotiva).
There are a couple of them on eBay right now, but the asking prices are way too high. I bought a couple on eBay last December and I paid $62 for one and $40 for the other, plus shipping, so keep an eye out. These are commercial quality home amps. They will give you much more clean power, bass and drive. Your Klipsch towers will really open up when they are fed well. The 50-watt Sherbourn that I am using now is a slightly more expensive model. They both have two channels for the input and I use one channel for HT and the other for two channel stereo in the rear and they keep up with the much larger front amp without any problems.
I have one of the LDS2/75 on loan to a friend who is listening to a pair of ERA/Peachtree D5 speakers with them. The D5's are only 87-db and they play plenty loud. I used to use a 100-WPC Sherwood receiver for the rear speakers and I replaced the Sherwood with the Sherbourn and the sound is much better, fuller, with a lot more bass.
Spend less, get more... ENJOY!