The T460p is a very good deal if you want something light, powerful and extensible for a very good price. You can get a version with a quad-core i7, dedicated Nvidia graphics card and 3k display for about 1400 USD. Combined with a three-year guarantee it's a very good deal I'd say, and much better than what most other manufacturers (including Dell and Apple) offer for this price. I also own an X1 Carbon, which is a great laptop but a little underpowered for my needs (and hard/impossible to upgrade).