I'm getting a Genie + Client next Tuesday (though I'm keeping my HR24) and was curious about your comment that you retain trick play control of live TV with a DVR. Can you not pause and rewind live TV with the client? I thought the client gave you access to everything on the Genie including live TV.
I think Inkahauts and Laxguy answered this, but just to clarify:
A C31/C41 client gives you full control, as if the Genie itself were at that TV. You can use all trick play, set and manage recordings, etc.
An HR2x DVR can participate in whole-home, can set recordings on itself (but not on other units), can play recordings from any unit, and has it's own tuners, buffer, and trick play.
An H2x receiver can participate in whole-home, can set recordings on any DVR/Genie, but has no trick play capability (no buffer).
You can have a system that is comprised of almost any combination of the above units. A genie, a C31, an HR2x and an H2x for example. The H2x would not have trick play capability for live tv.