What's he going to be playing? if it's anything halfway taxing at even 1920x1080 resolution, i'd dump the SSD and step up the graphics card as much as you can with the extra money. The SSD won't really benefit games much, and you probably won't fit more than one or two modern games on it anyway after the OS is installed. You could probably step up the card a step, and add another 2GB of ram, and i'd call it good.
Be wary of power supplies that come with cases as well, they're not usually great, but at 500W, it'll probably do it for you, just check it first thing and make sure the Amperage is up to the parts.