Now, I'm confused.

I can appreciate all the suggestions for room treatments, but isn't that like putting lipstick on a pig?

I mean, room affects sound/stage, but wouldn't a person want to start with the equipment first?

And room treatments, at least good ones, are very expensive. Look at the OPs list of gear, I dont see that the GIK stuff is similar in pricing. I mean, suggesting one GIK would cost more than his preamplifier or other piece of equipment. IOWs, it does not make sense to me. Yes, the room traps/diffusers will help him, but at what price? and then he never figures out which parts of his audio chain hinder the soundstage. 

I have plugged this before; but in case you missed it there is a CD that helped me do wonders with speaker positioning. I am in no way affiliated or involved, except as a surprised and happy user. It's the IsoTek Ultimate system Set-up disc.

i have bose 901 speakers. with 2 you have a basic system. if you want a wider soundstage, bose came out with their 'super bose system' back in the early 70's. 2 up front, 2 on the sides. that's what i have today after going thru the 4 chanell era.