Yes, I already know you need
HD FTA receiver to get HD FTA signals... Dont know about that 4.2.2 stuff though...
As for HD and digital, I always thought they go hand-in-hand... I mean I dont think you could (or want to) broadcast HD over analog OTA or if you could broadcast SD over digital (well maybe you can, but why?)....
In either case, when it's time to watch HD, just get HDTV and all will be good (and HD FTA receiver when the price comes down.hehe)>\
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Fortec 80cm dish, Univ LNB.
Fortec Classic NA
Captiveworks 600S Premium.

C-band 10ft dish, with Echostar 4000 IRD.