Seeking HD Format Advice

So I will eventually need to deliver master episode tapes to a broadcaster on 10801 59.94 HDCAM. My understanding is that regardless of what native compressed HD format we shoot and edit in, the right aja product will convert to this format on the way to tape. Great ! We have not been told what compressed HD we can or cannot use, they don't seem too bothered (of course they may be if the image we give them is total crap) but since we shoot a lot of material, a smaller file size will help in my archiving headaches. More hours of material on fewer TB's is my goal. My question.... DVCprohd 720 x 24p sounds nice in terms of size, but how will it look on the convert to 1080i, is it still pretty nice quality ? Other option is the DVCPro HD 1080i 60 which seems a little bigger in terms of how much size, but is there a huge difference in picture quality. Lastly, has anyone seen the new JVC which records Apple prores 1080i, which is bigger again in file size to the DVCprohd, but can be edited in FCP immediately. I guess I am just wonder what I can get away with when bumping up a compressed image to 1080i 59.94. Thanks for the advice.

Dave