You have to be very careful about speaker selection because your Rotel only outputs 75W per channel and many of the speakers today require more than that for clean sound. I was going to suggest NHT 2.5i's used, but you don't have enough power. I'm not sure you have enough power for the magnapan's that have been recommended.
I would actually look for a used pair of JBL L100's which would be a terrific match with your amp if you want great stereo for a wide range of music.
I would actually look for a used pair of JBL L100's which would be a terrific match with your amp if you want great stereo for a wide range of music.