Klipsch Forte ii too bright, or is it my room ?

Not familiar with the Fortes but back in the eighties had a pair of La Scalas. Happy when I bought them, happier still when I sold them. Sorry, just not my cup of tea and this was when matched with the original Mac 275 and/or Marantz 2´s ( these I regret selling to the day). 
Your room is definitely adding to exasperating the brightness but the speakers character  is what it is.

Klipsch sound better with tubes more than ss, and I have owned Khorns, LaScalas, Hersey II's, etc. One thing about Klipsch, people either love them or hate them, there is no in the middle. 

I like vintage audio. See my pics. 

I have Klipsch Chorus IIs, which are similar to yours. I found that a Pioneer SX-1050 was one of the worst matches, and it had been completely restored.  I sold it.  Too bright, and listening fatigue after < 30 minutes.

Sansui (60/70's) is an incredible match, as is quicksilver tube gear.  I like Marantz, but prefer Sansui.  With regards to gear made this decade, I tried Cambridge audio and thought it too was a poor match. Pass Labs is incredible (I built the 8WPC Amp Camp Amp, which is more than enough for your 80db).  As far as restorations, I'm in the boat of replacing all electrolytics, known noisy or problematic transistors/diodes and updated small electrolytics with film caps.  But others don't like to change anything that isn't broke.  When it comes to 45-50 year old E-caps....those folks aren't getting all the highs.   

Actually, without the mods, while I might not have been in hate group, call me lukewarm. Even in stock form I could hear the good and potential for better, even great. I'm sure being long time modder allowed me to hear potential. While my mods are not possible for many, there are some more simple mods that are effective in taming brightness. Yes, horn speakers are susceptible to tonal/timbre anomalies, but so are a lot of speakers.

I'd never advocate giving up on Klipsch Heritage, providing one is willing to work a bit. I also realize its not everyone's cup of tea, no harm, no foul.

Klipsch Forte’s and Heresy’s sound great if you’ve lost most of your HF hearing, otherwise they’re almost universally panned by serious reviewers. 

This isn’t even opinion, I don’t think Klipsch has ever marketed them as accurate.