I am not too tech savvy. I previously had an ipod (about 2 years old) which no longer works so I'm planning to purchase a new one. I'm very interested in the touch but want to make sure it's worth it. I notice there is a huge difference between the 8gb touch and the 160 gb classic ipod... should I be concerned about such a difference? Will the 8gb be enough??? Also, how is the battery life? I just want to make sure I spend my money in the right place. Thanks!