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

He needs to change only one variable at a time, changing room first may allow him to live with rest of system. If he intends on keeping Klipsch (which do have some admirable qualities even in stock form), damping the horns could be a next possible solution, assuming he still has issues with  brightness after only room treatments. Still has issues, go to tube amp, I, and many others who own Klipsch prefer tubes as we have the similar tonality/timbre issues with most ss amps.
He could explore the first two options with practically no cash outlay. If resources of no concern, I'd suggest the room fixes with professional treatments together with tube amp as initial moves.
Purchasing new speakers first upsets the entire balance of what he presently has, like starting all over again from scratch. Keep the Klipsch and proceed in incremental steps.

Get a Chinese KT 88 integrated...roll in the Gold Lions and cover the floors. Reisong A20 is sweet and cheap. The Schiit EQ. will also tame them.

I owned Forte II's years ago.  The biggest issue I had with them was amp.  I used them with B&K and before that NAD. I was young and poor and didn't know any better. They were too bright.  Yet, I would love to have them back now.  I'm putting together a small cabin system and have a Jolida JD-1000a integrated amp and Spica TC-50 speakers which are not cutting it. The 1000a is a EL-34 tube based amp and I feel, it would be a perfect match for the Forte's. I currently looking for Heresy's or Forte's. Advise: Try out an EL-34 tube based amp.

Yeah NAD and B&K would not sit well with most Klipsch speakers.

I have to say that I'd never want to have to switch between speakers to enjoy all the music I like.  I also think you're putting too much analysis into this.  It seems to me that the speakers don't work for you.  Sell them and get something else.  Don't waste time and money trying to fix something that for you is fundamentally broken.