I was wondering. Since you can place your prime meridian anywhere, why not rotate it around a bit so none of your major continents (except for the one near the south pole) are cut off at the edges? That would look something like this:

alt-mer.jpg

Nothing but a suggestion, and maybe there's something about that one loopy continent that makes it really important so you don't want to cut it up? I don't know. But other than that, I think this map is looking abso-effing-lutely gorgeous.