I'd take a serious look at one
I just put an SSD in my X201 (i5, 8GB) in an attempt to make it last longer. The X250 at least brought back the extra buttons above the touchpad, but I still can't get used to that new keyboard (then again, I'm typing this using a Unicomp Ultra Classic).
I generally hang onto Thinkpads for about six years. So a new one next year would be just about right.