Well, I have auditioned the DTs, but I don't think I auditioned that specific set of Klipsch.
I will tell you that if you like listening to movies with a lof sound effects and action, you will not beat the BP series by DT for the aural experience and the incredible punch they deliver. And frankly if movies were more my main listening requirement I swear I would have bought that set of DTs. I have never heard a better sounding home theater sound system. The sound just seems to come from all around you and it was sound you can feel in your soul.
However, music is more important to me. When I played various selections of music on the bipolar setup of DTs, they just didn't impress me as much. The soundstage was great, but the mids and highs were a little muddy and just didn't give me the sense of accuracy I was hoping for. When I heard them back to back with the Mythos setup, they just fell flat on the music selections I mostly like to listen to.
Conversely, the Mythos sounded pretty good with movie tracks and sound effects, but considerably less impressive than the BPs for movies. If I could have both; the Mythos for music and the BPs for movies, that would be the ultimate. However, my room, nor my wallet could afford that, so I went with Mythos 1s L/R, Mytho 3 C, Mythos Gems for surrounds, and a Supercube 2 sub. At some point in the future I may consider swapping the gems with my Mythos 1s, and getting the new Mythos STs for L/R duty.
I know I also auditioned a 5.1 setup of Klipsch speakers. I don't recall the exact model. From memory I seem to recall they were a bit bright and just couldn't reproduce good clean mids, but had decent lows.
Have you asked your local dealers if they lend you the speakers to try in-home. I think that is the only way you can really be sure. Take as much time as necessary to audition, and be sure to take your own material to listen to so you can compare the systems with material you are familiar with.