Klipsch speaker choices

If you like DIY projects, try a pair of Forte I's with Bob Crites crossovers, (or consider ALK crossovers), Crites titanium tweeter diaphragms, and an earlier (1970s in my case) Heresy midrange compression driver/diaphragm which were of higher construction/sound quality.  All were individual improvements to add depth and clarity while removing some of the "edgy" sound you may be referring to.  Total investment for the speakers in excellent oak cabinets was right at $1000 a few years ago, besting anything I've heard in that price range.  Pre amp and power amp (35 watts) are tubes, which have always provided a warmer sound than solid state for these high efficiency speakers.  At least have a tube pre amp in the chain.

(BTW, I also dampened the horns and did A/B comparison with mono source and heard no appreciable difference - just be sure the horns have there gaskets and are screwed tight to the baffle.)

This provided very good near field listening up to moderately loud listening in an open floor plan listening area with typical curtains, upholstered furniture, etc.  As others have said, the Forte's larger cabinet will provide a noticeably deeper bass than the Heresy and the passive radiator system they use is very good for tight bass, even compared to other speakers their size.  Tweeter and midrange compression drivers and horns are the same for Heresy and Forte with some crossover differences due to woofer crossed over higher in Heresy.

Then moved these modified Fortes to a 13' x 21' dedicated listening room with pine walls, drywall ceiling and some rugs on the floor.  Much more shrill and "edgy," with a smeared bass and loss of instrument placement, especially as the volume was turned up, compared to the first room mentioned.  Room treatments (absorption) including bass traps in all corners, first and second reflection points on wall and ceiling treatment above listening area now has them sounding better than ever with rich tones, open sound stage and all that.  The reflection point panels made the most difference taming the "edgy" sound.  And they sound great with everything from classical, jazz, blues, to well recorded rock (well recorded/engineered etc. being key here).

So room treatments can make a very big difference for any speaker depending on what type of room setting you have, so can be the best starting point.  Good luck finding what you're looking for.

Edit: To make one of my statements more specific and accurate regarding tweeters and midrange compression drivers and horns in the Heresy and Forte being the same, that is specifically for the Heresy I - III and the Forte I models.  Forte II use a different midrange horn and passive radiator, which some prefering the I vs. the II sonically.  The Forte III, as I understand it are slightly modified II's.  

I am not understanding, those that have dampened the mid and tweeter horns, and have not heard improvements, let alone, differences. Early on, the metallic horns were nasty, as they " rang ", and the later poly plastic horns, also have some resonance issues. I have performed hundreds and hundreds of damping mods, for myself, and others, and never had a situation, where a difference, of improvement, was not noticeable, and not appreciated. Not just Klipsch, btw.....cabinets, as well......Long live Klipsch.....

(BTW, I also dampened the horns and did A/B comparison with mono source and heard no appreciable difference - just be sure the horns have there gaskets and are screwed tight to the baffle.)

Same here. Spent a whole day damping the horns of my Heresys with bitumous pads. Fired them up and they were as colored as ever. I've intended to remove the material as I actually find myself enjoying them less after that mod. 

For anyone that can afford the space necessary for Spatial's open-baffles, there is absolutely no good reason in buying a Klipsch speaker, especially at their current price points. I only keep my H-IIIs around because they can still sound good when placed close to walls and are stealthy in terms of the room decor. But if I listen to them following a session with my Spendors or Maggies, their coloration/resonance is almost too much to bear.