I have the 8gig and like it a lot, so far I haven't had any issues storing the apps I use a vid or two and plenty of music to get me through 90% of my days. Even when I travel it does me fine.

I just noticed yesterday the 16g came down in price to $289 which is only about $70 more than the 8g so it really depends on your needs and hoarding.

I am debating on the iPhone now, but I need to do some research on hacking it for other service providers before I decide. I like my T-Mobile right now.