Windows 10 is awesome, be aware of your privacy though! When first time install, don't just click on automatic install. Click on advanced install. clicking on automatic install will not protect your privacy. Microsoft can collect data on everything you do, including keystroke data!
I had the first generation surface tablet, it had windows 8 RT, absolutely hated it, but it does look like Microsoft are now getting into the game a little more by listening to customer feedback.
I have just ordered the Ipad air 2 and hoping I have better luck with this one. So far I have had 5 tablets in the space of two years, non of them I liked. The last one I had was the Samsung Galaxy Tab Pro 10.1, Samsung's build quality is shocking, the thing fell to pieces so I have vowed I will never buy another Samsung product again!
For my phone I will probably stick with HTC ONE, the build quality is pretty awesome with it's metal unibody, and it is surprisingly durable. There is a video on Youtube where they tested the HTC ONE M8 by placing it in water for 30 minutes. It emerged still fully functional, and the glass screen is extremely tough too.
OMG! Can't you tell I'm a bit of a techy