There is such a large number of speakers that would sound good, that I don’t know where to begin. Everyone has their opinion as to what would sound the best, and most suggestions made would probably be good ones. Because of what I just stated, I’ll leave you with this website that’s full of great speakers for your situation: http://www.welbornelabs.com/index.html
Search this site, there are dozens of speakers and they would all work very well on your system.
Search this site, there are dozens of speakers and they would all work very well on your system.