Yeah I did move it to my HG, simply because I was just worried something happening to my LG, not that I have any reason to. It's just with the DS cartridges i feel like they're slightly safer and perhaps less prone to some kind of game/save file erasing error. (again not that it would, because i don't hack or cheat or anything, it's just a personal thing)
but Yeah, having a shiny Starmie taking on the E4 in Johto is definitely in the future.
I definitely support the idea of you hunting it as, given the amount of time you've put into it, you definitely deserve to be rewarded with one. However, if it is more effective to wait in White, that makes much more sense.