No phone is made to use for long time.
I just got mine I mean the HTC Amaze 4g and I am not decided yet if I will keep or go back to my Nokia N8 - If I can have both in one that will mean I will have a long term phone. When I got my N8 I thought that way, but all phone had some limitation.
So now I decide to list for sale so I won't have to choose myself which one I will keep. That means first sold will go then the other one will be mine; anyway both are great phones. No doubt.