Personally, if I knew there were not going to be 1/48 GBP armor, I'd want to get both the 1/60 with armor and 1/48 without. Hell, I think there will be and I still pre-ordered a 1/60 set of armor only.
However, if I was only left with the option of a 1/60 armored Valk, and a full size, naked 1/48...I'd go 1/48 all the way. Though I like the 1/60, the 1/48 is just a much better toy in my opinion.