I would probably go with some skunk2 tuner1's. I have seen a lot of cars make around 30+whp from them, but most of those cars had headwork. I know Jeff Evans seems to tune a lot of cars with them so I would imagine thats what he is recommending to people.
Well honestly, I would keep what you have and see if you make the power that you are looking for. They might actually be a pretty good cam.