If after all your experiments in proper placement, you find you still have the higher frequency sizzle you speak about, then it may be time to consider to new speakers.
It could be the sound of the metal tweeter that Totem is using that is not as pleasing to your ears and you may find the smooth, more laid back sound of a soft dome (textile) tweeter more to your liking. I know I have always prefered soft domes over those made of metals. Also, I would do all possible to get a dealer to allow an in-home trial to see how different speakers will interact with your room. While I always encourage auditions, what you hear at the dealers show room will not tell the full story.
Good luck and I hope you find the sound you are looking for.
It could be the sound of the metal tweeter that Totem is using that is not as pleasing to your ears and you may find the smooth, more laid back sound of a soft dome (textile) tweeter more to your liking. I know I have always prefered soft domes over those made of metals. Also, I would do all possible to get a dealer to allow an in-home trial to see how different speakers will interact with your room. While I always encourage auditions, what you hear at the dealers show room will not tell the full story.
Good luck and I hope you find the sound you are looking for.