This isn't a comparison of the merits of the two phones so to speak...I just have an opinion on if if it would be silly of me to just go ahead and get the iPhone 3gs now (there are some still some left, suprisingly) or wait until I can afford the iPhone 4. The iPhone 8gb is only 100 dollars and I can afford to get it now....but I'm wondering if it is a big mistake to invest in an outdated technology.

please give a reason why as well.