I am brand new to Crafster. (First post -- I actually registered just so I could respond to your question!)
I wanted to let you know the very very best resource for all diaper sewing questions is Diaper Sewing Divas. Here's a link: http://diaperdivas.proboards.com/index.cgi?
You have to register as a user to access the boards, but it is well worth it. I was quite active over there for a long time, but now that DS is nearing potty training, I haven't really been going there much. Any question you can imagine, the divas can help you with.
With cloth diapers, everyone has different preferences, so it can get confusing. 10 people will give you 10 different answers, so it takes trial and error to find your preferences.
For me, I probably wouldn't use rip-stop as an outer. I think you'll get a lock of moisture wicking out with that, even with the waterproof spray. Nylon isn't really meant to go in the dryer, and most folks like the option of machine drying their dipes as opposed to always hanging them out. A lot of folks use PUL for all-in-one pockets. I use polar fleece as an outer lot, and you can still get compression wicking with that, but it's really breathable and nice for summer. We tend to use PUL covers (proraps) with separate cloth diapers underneath. You also might want to make some with a stay-dry inner, such as suedecloth or crushed panne velour, but others with a natural inner, like cotton or bamboo, since some babes are sensitive to one or the other. My absolute favorite material to use for the absorbant soaker is cotton birdseye -- SUPER trim and absorbant.
Anyway, long-winded response, but my main point was to put you in touch with the Diaper Sewing Divas board -- I found it to be a HUGE help when I first started sewing dipes.