Well, SD3 is great but its musical strengths are more organic. Real drums in real spaces. There are some processed kits and such but I dunno how great they are. "Experimental" kits - not so awesome to my ears.
If I were primarily producing the synth-based '80's space music that so gracefully emanates from your furry paws, I don't think SD3 would be a huge priority. But if you are venturing into other, more organic universes, like singer-songwriter stuff, you can't go wrong with SD3.
just a devil's advocate thought for ya.
cheers,
-Tom