I really am bias towards the 4400. I have used the phone since the day is launched, and have sold it to many of my own friends and family. Its has more color in the screen, and I feel that the menu is much easier to get through. The battery tends to drain quickly, but there is an extended life battery for sale that really helps.

I must say that Motorola has made many many improvments from the 720 to the 730, but I am still skepitcal. We haven't had many complanits about it, and it launched in Aug. or early sept. can't remember.

So in my personal opinion go with the 4400, but keep in mind you do have 15 days to try it, so if you don't like one over the other, you can always exchange.