I'm trying to decide whether to buy an external flash to use with my Sony A200. At the moment I pretty much never use the flash as I prefer to use available light from a window or just shoot outdoors. However, my wife is now pregnant with our second child and I want to get the best possible photos of the baby when they're born so I'm thinking of getting an external flash to use either bounced off the ceiling or with a softbox head on it. My question is: do I need this or would I get equal/better results from using available light and a reflector (which I have). I've already had a look at strobist and a few other sites so I'm happy that I understand the technical part of it sufficiently. I'll be shooting with a f1.8 50mm prime so I already have a (reasonably) fast lens. All advice appreciated.