I rather have the Antec 620 than the Corsair H60 but for that mild of an overclock either one will be able to control temps..
and that case has plenty of room.
if going for a overclock of 4.2GHz or more than I would say something heavier like the H80 or so.
but you can get away with the 60.
is the antec 620 better than the H80