Doing tasks on the iPhone 4 is easy and everything transitions so smoothly. It's fast, has a high res screen, looks good, all the apps at your disposal etc etc.
im faced with the toughest decison of my life
iphone 4 or samsung captivate.
If you're going to go Android, I wouldn't get anything except for HTC or maybe Motorola. Samsung has been the worst at providing firmware updates on past phones.