For someone new I would probably recommend a synthetic such as a Naniwa 10 or 12K.
In regards to "best".... well you are likely to get a dozen guys giving you a dozen different answers. For instance, I pretty much do all my honing on naturals and prefer a vintage thuringian 9 times out of 10 for my favorite finisher.
I don't own a naniwa, but have shaved from them and they leave a very nice edge. Being a synthetic, they will probably be easier to get the hang of for someone beginning than a natural where they can vary in properties from stone to stone.