After finishing my current D&D 3.5 STAP campaign, in one or two years, I will be pleased to consider buying new Paizo products but I will run them with Castles & Crusades, the in-print game with the spirit I love.
So, in fact, I don't really care about the system they will use at that time. I am a bit tired on editions wars, and 4th Ed. doesn't have any sex-appeal for me at the time. So I made my own version of C&C and will stick with it as long as I can find players to game with. At one moment, stopping to wait or search for new rules is a satisfying feeling. Start with a good ground work and bring in more riches and depth, but stop worrying about rules, just play.
But I will always be looking for new adventures, and I know I can find very good ones here.