I've been considering an S60 phone about a year and a half ago, and I'm very happy I chose Android. The battery is maybe worse, and the camera, but everything else is so much better. Web browsing is way better, social networking is incomparable, speed is immensely better, and the apps are, well, astounding. Same goes for the widget support. Everything is just several steps above the S60. I still like their simpler business models though, because of the good battery, speed and stability, but that way you lose even more OS ability. The notifications are just phenomenal, too. That's something I would hate to lose.
So, to me, it's absolutely worth it. Same goes for the iPhone (I don't like the iOS, but I do understand it's great sides, and it is a great phone no matter what I like). On the other hand, if it's a good S60 phone, and you haven't really experienced something as powerful as Android or iOS (and gotten used to living with it day in, day out), you can be patient for a while longer. It will get the job done.