well i had a v60 for over a year and just recently got the 3650...
the v60 is really dependable, lasts, great reception etc etc...
but basically the only thing you can do with it is call and text, which is basically what a phone needs to do...
but dust does tend to settle where the "caller ID" thing is and the antenna does break (the entire base, not just the tip)
the 3650 is great so far...it is kinda big, but compared to all the other non flip phones, its not as big as you'd first think...
my friend has the nokia that flips out into a complete keyboard, and the 3650 is barely an eighth of an inch longer (when the phone is NOT flipped open)
plus the 3650 has a lot more things to play with...i mean its got video capability...yeah it's not great quality or too useful, but fun nevertheless...
the circular keypad won't take that long to get adjusted to either...