I agree with Mad Cow. Overall an attractive map, but the ocean is very dark, as is the land, and there isn't enough contrast to help distinguish the two. You could lighten the ocean as MCC suggests or alternatively you could create a much lighter "Sea Shelf" layer wherein the shallow portions of the land are much lighter than the deep. This is usually the technique I try to use when I work in this style. Also, you may want to increase the opacity of the labels layer just slightly (e.g. 5-10%) to help them be a little more legible. Everything else looks good to me.

Cheers,
-Arsheesh