For reference on LFS guys, one of the guys at mine(granted the rest are all reasonable) tried to sell me a Picasso Trigger for my 10G, he said it'd be fine for a couple years.
Some of them see it as I'd you buy a small fish and it gets big, you're likely to bring it back and they give you 50% store credit for it. Its a win-win for the store. All that said, IMO I personally would rather have a group of small, active fish like anthias or a wrasse of some sort.