Nothing beats a fullfeatured laptop! Then one must decide between two two camps Windows and iOS if you are so lucky.
Personally for work and the fact I'm an old dog still in the windows camp.
If I was picking for performance, weight and fullfeature it would be a surface, they aren't cheap but can't beat them for performance/weight and compatibility in a Windows world. I've never been a fan of touch for productivity work, but consumption tablet/phone is the way to go.
Being Windows and made by MS.. you'd think though you can't avoid the Windows stability and firmware pushes that are sure to come, the MS built got to get some inside help for stability, LOL.