If you can get locals OTA, get the HR10-250 now. You will have little need for MPEG-4 until they add national HD channels, and who knows when that will be.
Premiere Elite (2TB) on MoCA
Premiere (2TB upgrade) w/ MoCA adapter
Premiere (320GB) on ethernet (was to be a Mini - too late)
Left DirecTV 4/15/07. Left TWC 8/8/11. Forced back to TWC 3/7/13.