I have a Surface Pro, and I use an iPad Mini as a second/consumption tablet. I love the size. I really wish there was a high-end 7-8" W8 tablet on the horizon. I'll be looking closely at the Nokia RT tablet, even though it's 10", but unless the app situation picks up, I'll stick with the Mini. Besides, I'd be a hypocrite if I was critical of the competition without experiencing it ;-)
To be perfectly honest, if the Nokia 6" phone has high end specs, I might give that a shot as a consumption tablet. Of course, I'm expecting the off-contract price to be much higher than a small tablet, so it will have to be perfect. The hold up would probably be an HBOGO app.