Huh. Why do you need all those separate devices, anyway? I see your problem, though. You're a collector, which is weird given that MS has been positioning Surface products to simplify and consolidate device usage. Keep one mini-type for bedside reading and then get a Surface Pro to replace all the laptops. Sell all the others for some cash back and to clear space.
Well, I got the Nexus 10 last year because at that time I did not have a tablet and I needed something to read my books on. Currently, I use it mainly to watch movies before I go to sleep. I bought the iPad recently because after having tried a colleague's iPad, the 4:3 aspect ratio seemed to me to be the best suited for reading my books (I was correct!). I bought the Surface RT because I wanted to avoid carrying the 4-year-old ThinkPad R400 to work every day. It is built like a tank, but it also weights like one! I bought the H520S desktop because I had sent my R400 for some repairs and I needed a computer at that time. This was before I got the Surface RT. And, anyways, a dual monitor set-up is excellent! The Kindle I had got as a gift a long while back - have not used it in a while though. The Nokia 720 is my everyday-use phone. I really did not want the S3, but it was left for me by a relative. Can't give it away - don't know what to do with it. Currently use it as a music device (and as a secondary phone for some dedicated calls). Some of my close relatives know how much I love ThinkPads and they have determined to gift me one despite my protestations. And, since the family connections are complicated, I can't be too forceful in refusing to accept their gift, but in the same vein, it would be ultra embarrassing if I were to sell it and they were to find out. In the meantime, I am trying to see if I can get them to present me with a Pebble instead of the ThinkPad - because, ideally, I would like to buy my own Thinkpad and it will be a Carbon (spec'ed by me!).
Edit: Btw, I don't like the concept of the Surface Pro, but I do like the concept of the Surface 2 (RT). I think the latter is a brilliant idea (assuming one has ready and relatively inexpensive access to the internet - either over wifi or by tethering (both of which apply in my case at the moment, thankfully!).