From what i have read many go with 1.25:1 rockers.
I have used stock rockers this year but for this season i will try my new oval wedge heads together with 1.25 rockers.
There are lot more expirienced guys here that can tell you what to do but as always it all depends one for what purpose you are building the engine and what the other components in the engine are, the gain is perhaps 3-5% on a engine that puts out around 150hp, correct if im much to wrong