I think I'm tracking on the intent of your original post. I just want a new fat-kid EW bird that can fill the same role as the EC-130 in the SEAD triad. Something with lots of room for expansion of new capes, has a long dwell time on station, and is capable of finding it's own targets, etc. If that means putting it on a 2-eng 777, cool. If it means putting it on Js, also cool. I thought C-17 were the answer for a while, but that's gas guzzling SUV that's maybe not worth the induced fuel costs for the additional benefit. Really I just want the AF to quit dropping EW in priority. It's too important a force multiplier to be shelved.
Annnnd at this point I'm putting a pin in it. We'll pick it up if we ever cross paths in a more appropriate forum.