I have the Hsu speakers, and I don't really find them that bright with respect to other speakers. In fact I would say my Infinity Primus speakers are brighter, however positioning makes a difference with the Hsu speakers, more so than other speakers, so I think it's possible to adjust the sound of the Hsu's. Some people like them toed in to cross in front of the listening position, others like them facing the listening position. Some owners feel there is a big difference between the grill on and off, but I haven't been able to hear that difference.
I haven't heard enough Klipsch to really compare them, but what Klipsch speakers I have heard I would not describe as tinny at all.
I really like the Hsu's, they are a solid speaker, and you can't go wrong with them. They are great for music, awesome for movies, lots of slam, these are very powerful bookshelf speakers.
If you are interested in horn-loaded speakers, BIC Acoustech also makes some very affordable ones, although they don't have horn-loaded bookshelf speakers anymore, they do have some very nice looking towers.
If you want the hsu's though, don't wait too long, they are on sale right now, and I don't think that sale will last a lot longer.