You could partition it, but I dont see any point in doing so. If you want to make it easier to organize whats on the SSD just set up a decent folder system on the inside.
If you did partition, 30-40GB would be enough for the OS initially and I imagine after a year or two of updates. Its good to leave your OS drive/partition with some room, otherwise Windows bugs you with popup notices saying C: is running low.
I was thinking along those lines too. Thanks for the quick reply.