Never heard the Klipsch, but I have heard Omnisats. I was quite impressed with them.
Aside from sound quality, keep in mind that the Omnisats are omnipolar. You can be anywhere in the room and get consistent sound. From pictures, I note that the Klipsch are standard forward firing speakers. So they will sound quite different, and not as good, if you move off axis from the tweeters. I suspect from your post that the Omnisats are probably better suited to the application you are going to use them for because of their omnipolar design. And they do sound good.
Aside from sound quality, keep in mind that the Omnisats are omnipolar. You can be anywhere in the room and get consistent sound. From pictures, I note that the Klipsch are standard forward firing speakers. So they will sound quite different, and not as good, if you move off axis from the tweeters. I suspect from your post that the Omnisats are probably better suited to the application you are going to use them for because of their omnipolar design. And they do sound good.