Heads, which ones when....

I think I'm in the wrong sport...
What ever happened to.... "right out of the box" products? Must everything be so complicated, why can't you just buy a head that's already, ported, valved ( new terminology, lol) shafted and ready to go no better than this head that you just bought ?
But, noooo ! We need to find Jack the head guy, who will then show you on Joe the flow guy, how good the head is because Peter says you need to use Brad's intake manifold if you want the work Jack did to show on Joe's work sheets.
Bah Humbug... and it's Christmas.

MAPS
You can. Trick Flow or ProMaxx will be ready out of the box. But many here will recommend having someone in the know check them out wherever they come from. No company is perfect and is it worth the risk of hanging a valve?