I've got a Surface Pro, which is ok, but I rarely use it as a tablet. I've also got a Lenovo which is almost 7 years old, and I'll probably upgrade in the next year. For durability, my Lenovo is tough to beat. I'm eyeing up a Yoga 910 (waiting to see what the 910s is like).
The reviews for the 910 are quite good, if you're wanting a portable machine. I believe it is fairly easy to run linux on most lenovo machines if that's your thing.
Deciding factors for me are graphics performance, rugged portability and usable ports. I do computer graphics and computer vision so 16MB of memory is fine for my needs.