What is the best dry rock to start with?

I am going to be setting up a 20gal reef setup. I was going to use a shallow sand bed (TE reef flakes) and was going to start with Dry rock I know pukani is the lightest and most porous but I've heard that reef saver rock requires less cycling and is generally cleaner. Also that it is very easy to aquascape with. I have been told BRS reefsaver and Marco rocks are the best. Do any of you have some experience with either one or do you have another suggestion? Thanks as always for any input