So I found this website and while this post isn't about loudspeakers per se, I think it provides some interesting things to play with for the speakers it has available in it's very limited database.
It also gives a little bit of an idea about how acoustical treatments may affect your room. I thought it was pretty cool, take a look give me an opinion.
Test: Stereoplay, Englisch
Did I find a gem or something less interesting?