I have a pair of C60 Mk II's that I have enjoyed for more than 15 years using several different amplifiers. They're not very efficient (86?) but your room is small enough that you should think about a "near field" setup. Put them in a weird corner nobody uses and listen like to a desktop system. I have done it with my C60's and the experience can be really good--and you don't have to blow the roof off to get loud.