The Blu-ray player was our excuse to get a PS3 lol. And we do use it quite a bit for that. Infinite is really good so far and judging by the all the good reviews out there I expect it will stay that way. For a cheaper option you could try the first BioShock, which you can probably get for a couple of bucks at this point, though it sounds like you'll still need to get a system to play it on.
If you can get the needed hardware together to play Four Swords co-op (GBAs and link cables), do it. There are few multiplayer experiences that are more fun.



