Tekton or Klipsch

I'm going with the Tekton double impact monitors, for a 16x24 room that should be plenty especially with a good musical sub. No need for the 4' high version IMHO
they are getting rave reviews as being powerful and accurate sounding, good for everything from Metal to Mozart, check back in a week or two and I'll be able to give you my personal review

I'm not sure how large or the shape of your listening space, let me add a few comments.

Heresy may sound better in your space than Forte's.

I have had horns and 15" woofers, and rear ports over the past 50 years. Necessarily wide face of speaker enclosures. Even though/because  horns have wide dispersion, the proper orientation of drivers is important for imaging, especially wide face enclosures.

1. heresy, see how they aim up, that get's the tweeters/midrange properly directed to ear level seated. They are usually toed in away from side walls also. It also changes the orientation of the bass angle to the floor, ceiling, walls. I like all of these factors. I have heard them, very nice.

The Forte (never heard them) at 36 tall, flat orientation to floor, ceiling, walls can be problematic. Origin height of tweeter/midrange horns below ear level.You could angle them up yourself, and toe them in. I definitely would.

A rear passive radiator, Forte, like a rear port, needs careful placement, Like their famous Klipshorns, the rear surface/corners reinforce any rear soundwave, driver, passive radiator, port: likely problematic unless carefully and successfully placed.

Wheels. I have near corner placement for lower level less focused listening, and, wheels to move my very heavy speakers forward and in, away from the corners, for 'real' listening. Only 3 wheels, 2 in front, 1 in rear. 3 so non-wobble is always achieved by gravity, and the weight is distributed/divided by 3 rather than 4. You could add 3 wheels to the Fortes.  I have a block above the front two wheels which angles the speakers up. I would definitely do this to the Forte.

Forte rear passive radiator. I and driver manufacturer designed a rear port for extreme bass extension of my 15" woofers. I have the ports blocked, in the current room, they are too much, not needed, cause problems. Passive radiator, you don't have an easy option to omit them IF they cannot be placed to extend bass without causing unwanted sound. In that case, the Heresy, which you already know sound great, will be a better choice. Smaller Heresy also wins the 'wife factor' challenge.

I had the original Forte I speakers for several years and enjoyed them hugely - only displaced by some Altec 604s. They are very musical speakers and a real pleasure to listen to, as you noticed. I did not find them at all complex to set up and orient.

I would be surprised if the current ’heritage’ Fortes are really any better than the actual heritage Fortes. There might well be used Forte I available locally at an excellent price. Crites sells diaphragms and crossover rebuild kits, should you feel the need and be handy with a screwdriver or soldering iron.

This approach allows you to ’audition’ the speakers for as long as you like, and then release them back into the market if they do not meet your needs. They might well not be released - I still have mine.....

I haven't heard the Forte's, but I had Klipschorns for 17 years, and enjoyed them very much. I traded them in for the Double Impacts seven months ago and haven't looked back. The Tekton's are more detailed, transparent, and have a much deeper and wider sound stage (I highly recommend a tube amp to reach their full potential). I experience zero listening fatigue with the Tektons, but that wasn't the case in long sessions with the Khorns. Give the free home trial a whirl. I suspect you won't regret it.

I have had Belles, Heresy II, Heresy III, Cornwall II, Cornwall III, Forte I, Forte II and Forte III.  The only one I did not like was the Belles. They had a cabinet resonance or a hump around 200hz (estimated) that I just could not live with.  The Heresy II bass response was not only limited in extension,(as all Heresy, Belle and La Scala are) but basically shelved down about 3dB the whole range of the woofer. Heresy III corrected that.    I actually prefer the Forte I or Forte II over the Forte III.  The Forte III is not as smooth in the midrange as the Forte II to my ears. 

You can get by without a subwoofer with Forte or Cornwall (and of course K-horn) but you will be missing at least another full octave with Belle, La Scala or Heresy.