When I initially upgraded, I got the 16GB iPhone 4. Well, my iPod Classic soon broke, so I was left with the decision to get a 32GB iPhone 4 on eBay or make due with my 16GB until the next iPhone came out. Ultimately I decided to purchase a new iPhone 4 32GB on eBay, and subsequently sell my 16GB. It's a decision I don't regret in the least bit. I don't have a ton of apps installed on my phone, but I do like to keep a good bit of my music collection on my phone since that I use the iPod app to listen to music in my car. Plus it really works for me since instead of bringing my iPod and iPhone with me whenever I went out, I just can grab my iPhone and know the majority of my music collection is on there to listen to. For $100 more, I definitely would "upgrade" to the 32GB.