Coal, the objective isn't to "fill" a space, it's simply to have an adequate volume level at your listening position, so distance is a more significant factor than room size. The 10' distance you mention is pretty typical for home setups(including my M22s). At that distance the drivers blend smoothly and your 1712(very good buy, incidentally)will have the power to supply more than a safe(to your hearing)listening level. So no, they can't be "a bit much" and you're the one in control of the listening level.
