Any of the heads you are looking at will give you more flow, more power and less weight. I don't think compression differences will have a big effect with the current build.

Perhaps pick based on what would work best down the road when you go with the stroker. Run the compression numbers that way. A 3.75" stroke 451, for example, may work well with shelf flat top pistons and 80-84 cc's. Stroke longer than that will probably need a dish piston to dial in compression for pump gas with any of the choices.