For an OWB holster I suggest the thicker stuff 0.93 or 0.8. Reserve the thin stuff for IWB holsters where thin is more crucial.
Out of most of the paddle designs I've seen using kydex I like JSHolster's design the best.
JSHolsters.com - We don't do pretty. We do practical. It's simple and effective. Many other paddles have this large piece of kydex against your body which can lead to sweating very quickly.
__________________
Mine: S&W 908.....Wife's: Ruger SP101 3"
------Kahr PM9...............Sig P239 (it's her's now)
------Norinco 213...........Charter Arms Undercover
Hidden Defense - Personal gun & holster designs/reviews.