OPINIONS VARY:The relationship between room size & choosing speakers

I am new to all of this and trying to find best size speakers for a small room. I recently listened to B & W 802D's (with a McIntosh MC452 & C-50) at a local audio store & loved the sound. It is a great deal of money for me, but worth it if I can create that magic at home. My fear is that I will be listening in a 10' x 12' room and that the speakers will overwhelm the room. I also think of the B & W 803D's (smaller, less money, not quite as full sounding), and still have the same fear. Right now I am trying to decide between the 803D's & the 805D's with a good subwoofer (possibly Rel 328 or JL audio F112). Any thoughts or help greatly appreciated.

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