Might be worth the wait to see what Thunderbike comes up with on their cams. In fact, I think they should be coming out with something soon for the 790cc motors from their past posts. They first went with cams for the 865cc motors, and said they'd do the 790cc motors next. Anyone checked on this lately?
I think for the money better carbs might produce about the same results in increased horsepower for less money. If you can wait, it'd probably be worth it to see what Pat and Matt end up with on their dyno runs to see what direction you might want to go. I believe Pat said he was going to dyno his bike after the Georgia Rally in May. Matt has the Amal carbs that Brent will be selling soon.