[Martin Spirit]"is History Channel still at this level of delivery?"
Yup. Bear in mind that the MAIN camera was a Varicam, and the HVX-200 cameras were B-cameras. The Channel still considers them B-cameras and specifies that only a certain percentage of footage from those cameras can be in the final show.
But then there are cases where the ENTIRE show was all shot with HVX-200s. The show about the tunnel diggers of NY, the guys who dig the aquaducts (forget their actual names) was shot ENTIRELY with those cameras. So if needed you can get wavers.
[Martin Spirit]"I want to cut the show at 720p24 (FCP) then bump it to 1080p for delivery on D5 using either our Terenex or after the grade in daVinci Resolve. "
What will you be editing with? Avid? Then that would be the workflow. On FCP it is a lot cheaper to edit with FCP and cross convert on the fly when you output with the AJA Kona 3 or LHi...that's what we did.