Help me choose camshaft...

Putting higher ratio rockers on the stock cam probably won't net you any perceivable difference...although it will give your lift a theoretical .030" increase in lift and more consistency as the factory rockers weren't always "correct" with the 1.5 ratio from one to the next.

With the cam, any of the ones suggested would likely improve your current situation...just make sure you properly degree it in, check clearances as necessary, and match your components (springs) to the grind...also, proper break in with high zinc oil or additives...wouldn't want that nice new investment to go flat.