GTA 5 or Far Cry 4

Personally, I go with Far Cry 4, I haven't read into it, but if it improves on Far Cry 3, I'm would go for it. GTA isn't bad persay, but that whole city landscape sandbox game I prefer in Saint's Row, the seriousness puts me off of it, not a bad game though.

Id suggest Farcry 4. Gta V is definitely a great game, but you could pick it up for pretty cheap on a different console (providing you have one)