Well that is what's good about this board - you get several opinions for the price of none. I admit that I have never personally run a hybrid head and it sounds like those of us who have had recent success with them have overcome any durability issues common in the past. Aluminum heads are better candidates in my opinion for ease of repair / fab. And try to find a head to use with the same bore spacing as your block as offsetting the valve guides vis-a-vis the bore centers even a few hundredths of an inch can greatly affect flow.
Good luck on your project.
