T series (14") have better keyboards, but the 12" form of the X series is great. It's mostly a choice of X260 vs T460s (or the x70 models coming out this month). The X1 is interesting if you wanna look flashy, but lack of user serviceable parts isn't too attractive.
I usually run my X250 with throttling turned on, and TPFanControl to keep the temps down so the keyboard stays nice and cool.
Biggest problem: ThinkPad screens suck. The T470s will have a 3K screen so that might be better than what they've offered before. 16:9 really sucks though. If they'd just ship a 16:10 or3:2 "Retina" quality screen I'd be so very happy.
Some people just like Apple's design though. I don't get it but there's no accounting for taste. So if you can stand the keyboard and heat, go for it?
Edit: ThinkPad service is fantastic. Get the next business day business warranty. Any hint of something I just call them up and they come out and replace it all. Excellent.