Upgrade for Paradigm Prestige 75F?

thanks sbrents73, I thought maybe it was the peachtree that was the culprit of the harsh high mids but I tried it with some different speakers (at friends houses) and it didn't have that problem.  I think its the speakers that are responsible for the sonic signature.  I think I'd rather focus on the speaker part of the equation rather than getting a new amp (as cool as the Anthem might be)

thanks gongli3, My friend has some harbeths that I like a lot.  Much more lush in timbre than my paradigms (can't remember the model but on the less expensive end of the line).  The Prestiges do better with soundstage and detail though.  I'll look into Spendor.  I was also interested in Revel.  Anyway, thanks for the suggestion

steakster thanks for the suggestion.  I don't have power conditioning but I'm pretty sure it's not distortion.  I'm fairly familiar with what distortion sounds like in its different forms and what I'm hearing is not it

thanks

Thanks b_limo and m-bd.  I will continue the search!  My friend has some Harbeths that I like a lot.  I will try to audition more British speakers.

m-db, one of the things that attracted me to the Paradigms in the first place was how I could hear each instrument so clearly and the timbres were so separate from the other instruments.  Other speakers I listened to had a cohesive sound but instruments kind of blended into each other particularly in low mids and upper lows.  The Paradigms are great in this area.  To me, they really outshined their competition at their price level at accomplishing this.  I would hate to lose that quality in getting a speaker that had a more rounded and full upper midrange.

In my upstairs system I have the ultimate point source in the form of single driver Omega speakers.   Timbrally they are gorgeous.  I love them but they would not work for the downstairs system.  The sweet spot is VERY small and they lack enough bass to fill the living room.

Anyway the search continues.  Thanks for all your feedback!