It would probably be worth buying a console to just play this game. It's huge and if you ever complete it, there's GTA Online. It has so many neat little touches and always throws something new at you.
There are three different characters you can play and they all have their own complex stories.
GTA: V has to be one of the best games ever and if you don't mind the more mature content, you're sure to be rewarded. It's also worth taking a look at the next-gen version even if you already own this on the Xbox 360 or PS3.