Fathers Day.. what do I get?

Father's day is coming up and I'm torn between getting the hubby a First person shooter ( Gears of War) or Guitar Hero2 for the 360

so.. what do you all think? Hes been talking about getting guitar hero for himself, but hasnt been able to find it, and he just beat one of his first person shooters last week and doesnt care for the other one we have ( Call of Duty something or other)

ooh.. Bullet Witch looks cool.. but now Im shopping for myself...