Oooh, didn't realise wilbur's precipiton could be wrapped. I should really pay more attention to the options shouldn't I?

Making a 3d sphere and displacing it with a heightmap, which is what I believe you mean when you mention the "fancier tools" isn't really what I want. Something like fractal terrains with some more powerful erosion and editing tools is what I want really.

Oh well, thanks for the protips anyway!