Grant, my room is 16' wide by 20' long, with a shelved 9' ceiling. Either model is orders of magnitude more efficient than my current speakers. I currently run Parasound JC-1 monoblocks @400 wpc, although down the road I might want to switch to tubes. The additional 10hz of bass reach would be nice, although the Seven's more manageable cabinet size is appealing. Your idea of outlining the footprint of each model is a good one. Tom