Stand alone tweeter?

@gondo101 
Taking a cue from dekay, I'm reminded of an old, less elegant solution if you don't have grill covers for your Forests.  Try hanging a piece of toilet paper (or two) over the tweeters.  Supposedly an old recording studio trick.  

When the Totem Forest loudspeakers were reviewed in Stereophile the measurements showed a lively lower treble coupled with strong resonant behavior above 20kHz.  You're obviously very sensitive to this.  Your only true solution is to get a different loudspeaker that doesn't have this set of problems.  If that's not a possibility I would suggest you experiment with toe-in, tilt and listener height so that you are not listening directly in the worst axis of the loudspeaker's problem area.

@gondo101 

onhwy61 is exactly right about the S'phile findings.  Lowering slightly by removing the balls and perhaps even trying some toe OUT might be of help.  I also found positioning them closer together (under 7 feet apart) was helpful bringing up the bass.  Stronger bass might better balance the treble.  In one review (Audiophilia?) the writer had commented "pay attention to how Vince B. has them positioned at shows".  Photos of Totem Forests from a show allowed the carpet pattern to be used to determine distance between the speakers. They were a lot closer together than I would have guessed.  I do remember the step chang in bass output (and vocal clarity) that resulted moving them to mirror positioning in that photo.  

Belatedly it occurred to me to ask how old your gear is.  Could this harshness be break in pains for the Forests or any of your other gear??  It took a LONG time for the Forests to start producing meaningful bass in my system.  

By the way, you have some VERY nice gear.     

I can't comment on your tweeter situation but it occurs to me you have some very high end equipment tethered to a good but relatively speaking budget speaker. I am not saying it's the cause of your HF issue but it looks like a bit of a mismatch overall. Did you just buy some or all of that gear and were the Forest's  speakers from a previous system?

 if your tweeter is too sharp your crossover maybe is not to good , to save money and not break the bank Foste X great Capacitor from Japan but limited in sizes, 
Madisound carries them.
A Audyn Copper , or  clarity CSA, Obbiggato Gold   try the capacitors first 
And resistors buy a mills resistor 12watt just find out the specs 250v is more then enough voltage.start there  that is where more then 1/2 problems arrive from 
In Loudspeakers.