RPM heads will make plenty of power if you're always going to stay with a standard port. The EZ heads require a special valley plate and they raise the intake up so hood clearance can be an issue. But they'll make more power and give you the option of switching to a MW port size down the road if you want.

There are decent low profile MW intakes such as the Mopar 337 if do decide to go that way. You didn't say why you wanted to stay with the standard port size so I'm just guessing it is becuase you want to keep a low profile or you want to re-use an existing intake.