DIY top and under quilts

Well, I took someone's advise and have been on the lookout for My Luxe down stuff on eBay. Well, with some patience I've managed to acquire 140oz of 800 fill down for an average of $2.27/oz. Now I just need to do something with it. My thought is to make 40*, 20* and 0* top and under quilts for my wife and I. Is that close a range overkill?

So, the questions are what is your favorite pattern and do you use the same one for all temp ratings? 3/4 or full length for 0* and 20* UQ? What is your favorite material to use and why?

At some point I'm considering making hats and pillow if we still have down. So, if you have any favorite patterns along those lines please chime in.