IPhone :: 4 16GB Or 32GB: Do I Need The 32GB? 16GB Or 32GB

Im not one who feels they need to put their entire music/iTunes collection on their phone. I will probably have no more than 1GB worth of music at any one time. If Im feeling conflicted maybe another 1GB but doubtful. As far as videos I wont have more than a few on there. Maybe another 1GB or 2. As far as apps, I highly doubt I would ever get more than 100 apps at once and from what I understand, outside of GPS apps, they are all pretty much 10MB or less. So at a 100 apps maybe another 1GB there. Lets say I buy a GPS app that takes up 2GB. So Ive got 1GB in music, 1GB of videos, 1GB of Apps and a 2GB GPS app. Ive used 5GB and I would have somewhere between 10GB and 11GB left.

Now lets talk about photos. I wont really load anything more than some wallpapers but when I start taking photos (and videos) I wont let them pile up for too long without moving them to my MacBook. So if I have several hundred photos on the iPhone at any one time, lets say 1GB to 2GB used.

Would I be fine in this scenario? Or should I go for 32GB? So I may get down to 8GB free, maybe less if I let stuff build up more. Would you find this acceptable for your use?