I'm no audiophile by any means, but I have a pair mated to my Avionic'd Sansui G-801. Lovely combination.
I've read the more power you have to throw at them the better, but my ears are content with how they sound with 120wpc.
Room size? :scratch2: I'll be the first to admit I'm not utilizing mine to their full potential in my loft area but that's another story.
What do you currently have to drive them?