Anyone run with full range high efficiency speakers?

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The ideal dac/amp would be an all in one unit that ALSO provides low pass and high pass filters for subs and the full range drivers.  It seems that the D200 does exactly that.  Am I right? 

That's right, assuming you're using the pre-amp output to drive the sub(s).

In fact, filters for the main speakers can be configured differently depending on whether or not the pre-amp output is enabled, and the pre-amp output can be toggled on and off by assigning this function to a button on the remote control.  That makes it very easy to switch backwards and forwards in real-time between a full-range, main-only configuration, and a sub-plus-main configuration with the D200 doing the cross-over.