I really like Daid's original models, but they look pretty facited in some areas, so I subdivided the mesh's twice in blender. Blender is such a pain to use I thought it'd be worth uploading these models so you don't have to go through the pain! Subdividing inspired by but not actually based on Angus' Twilight Sparkle.
Do what you like. I printed my Rainbow Dash on a Makerbot Replicator 2 with 0.1mm layer height with regular clear "natural" makerbot PLA filament. Rainbow Dash is the coolest pony in all of equestria! Anyone who tells you otherwise is just jealous of how awesome she is!