>>3086138X-570 or X-700 are both fine. The latter has program auto mode which means the camera will choose both aperture and shutter speed. It's a niche thing but I've used it to good effect shooting motorsports (the enduro pics in this thread for instance) and airsoft games. Since it's mostly useful in fast situations, it's best used together with an auto winder. The X-570 displays more information in the finder, which is why many prefer it to the X-700, but you'll be fine with just either one.
X-300 is a budget model with much less features and not even that much cheaper these days, so it makes little sense to buy.
Pic related, it's my workhorse.
