Yep, sounds good to me. I've been able to breathe very well in my DWR sock, but breathable ripstop sounds like a plan.
I'm going to put a strip of some really lightweight ripstop (poly) I found at wallyworld a couple of inches wide down the length of my sock and widen it a bit. The ripstop is not coated at all; I can breath normally thru it. I think I was getting a little compression from the last one and the strip of untreated ripstop should help with condensation.
Since you have some DIY 'sock' experience, whatya think?