I’d recommend you either ask him what he wants or let him pick one out. The problem with a laptop is you’re stuck with what you buy, no changing out parts later. Even if you buy the fastest laptop available, if it’s got say an Intel video card in it, it’s going to suck for games. There are other considerations beyond video card as well, so it might be a good time for your son to learn about compromise and give him a budget and let him choose what he thinks is important.
