I'm planning to purchase the iphone 3g today... but not sure if i should get the 8gb or 16gb.I already have an ipod... so i dont plan on putting that many songs. All i basiclaly need the gb for is for apps and other things. plus im planning to get the 70 dollar insurance for 2 yrs. would you recommend that i go for the 8gb and get the 2 yr insurance, or shell out more cash for the 16 gb