The Beethoven's would sound very good with your gear. Even better if you add a REL sub. Another choice would be Vandersteen 3A Sigs. Determining which speaker is the "Best" is fully your decision, for everyone's taste is different.
OK, best speakers for 2500 USED......
That would be about $5000 new. I am running a BAT VK-200 amp, a BAT pre (yet to be purchased). I value an engaging musical quality, 3-D imaging, "speed", like the voice is in the room, jumping out at you. Let the suggestions begin......thanks, this board is great, I have learned a lot about high end......Mark