Which heads to get?

Buy what fits your budget.

A well prepped set of EQ or RHS X head will stomp a mudhole in a set of OOTB ede's. You'd need to port the ede's a good bit to match either iron head.

The weight difference on a street or street/strip car is so overblown it's stupid. It takes 6 hp to move the extra weight on a 12.00 car... SIX. The iron heads will make a bunch more than that compared to the ootb ede's.

If at some point you want to build something in excess of 550hp, then the ede/alum is a good choice because it will support those numbers in all out ported configurations. Otherwise it's a moot point.

Pick what fits your budget and goals and go with it.