Whats going on felllas, going to do the head up and was going to purchase valves, springs retainers you know the whole thing. Was curious cause i was looking to get some Ferrea valves but Skunk2's come with that coating on them. The skunk2's are 320 and the Ferrea's are 220.00. Will the coating help that much that i should get it over the Ferrea's? I mean both are name brand valves..