Ipod touch (64 gb) or ipod classic (160 gb)?

i’m planning to buy an ipod this may and i can’t choose between the ipod touch (64gb) or ipod classic (160 gb). i know a lot of people are going to go for the itouch but i’d have to add that i already have an iphone. or do you think i should wait for an ipod touch with a 160 gb capacity?please help me!