the Ex cluster runs to 9k numerically but has area for 10k, just not the number on the cluster. Every motor is different so it is hard to say your optimal areas of power just for your specific ride. B16's usually get a 5700rpm crossover and I would set your revlimiter to 8500rpm, there is no need to go any higher on your stock cammed motor, please what ever you do, put a revlimiter on it even if you plan on going higher and higher into the rev range in the future, some of these kids decided that they want to have no revlimiter and they wonder why their shit went boom. 8200rpm is a great shift point with the oem cammed b16a. Have fun.
Milan