Speaker recommendation for mc452 and C2600


Recently upgraded from ma6600 to mc452 and c2600. (about 3 weeks ago) Not happy with the new sound I'm getting. 
I have vienna acoustics Mozart grands and REL S5 set up in my basement dedicated theater room.

I listen mostly to classical, piano and symphony. 
This is my second system, I kept the ma6600 paired with mcd550 and VA bach speakers in the living room. 

The sound Im getting is less detailed, lacking lower end control and overall very bright and unpleasant highs. Definite listening fatigue after about half hour.  

Do I need to upgrade my speakers? I feel my speakers are the weakest component in my system. What would you recommend for my music tastes and 6-8k range, new or used. I'm thinking I should avoid rear ported design as I need to place them close to the wall. Also, aesthetics are very important, that is why I picked VA initially. 
ei001h
Very impressed with Dynaudio, especially c4 platinum. Also looking at Focal, B&W and Sonus faber. Which would be best for classical? I read that diamond tweeter in BW is not ideal. What about magnepan? My local dealer insists they're good for just about any music and best value. Why are these so cheap relative to other high end stuff? I wish I could listen to these before buying, not much choice in Upstate new york
This past year I've acquired a C22 reissue and some Klipsch La Scalla IIs. I use the C22 as a phono pre and as a buffer between a Rega DAC and my BAT VK300SE integrated. Got to say the Klipsch are amazing! These are my first horns in 40+ years and I feel like I'm scratching the surface as far as getting the most from them.
What is your budget for the speakers ?
This Monitor Audio are amazing for classical music :

http://www.monitoraudio.co.uk/products/platinum-ii/pl300-ii

The Proac Response D48R are really stunning speakers for any kind of music with its ribbon tweeters and dual professional studio drivers.

https://audiorevelation.com/products/proac-response-d48r/