Im considering upgrading my current hardware Att 8125 to a Iphone 8gb 3G. I'm not someone that really would be into using the video, or mms aspect as I usually send pics as attachments through email and have used the video featre little to none on my current phone. Is there going to be such a vast difference in speed and performance from the 3g to the 3GS to warrant just getting the 3GS ie..standby/talk time..battery life?. My Itunes library is a good size currently but 16gb i think would be a bit much or do iphone apps take up a lot of space? Any input would be appreciated...i'm somewhat leaning on just getting the Iphone 8gb 3G and waiting the obligatory 18 months before i can upgrade again..by that time the next harware iteration will have been out for 4-5 months already.