I decided to go with surface 1, because of the price and how next ones have not evolved so much. Around 400 euros gets you a decent, quite comparable with the latest ones. I would prefer bigger screen, but it is not 500 euro difference need. couple of things that still annoy me:
-border accuracy with the pen is awful
-touch keyboard is useless rubbish. Even on-screen is better, I didn't know it doesn't have real buttons before I purchased it.
-original pen has only one button(would not be problem without the next one)
-no intuitive way of using modifier keys while drawing/missing modifier keys and this slows everything way down. Maybe there is way to remap volume buttons, haven't tried it yet.
If you are thinking of getting one, take get surface 1 off from the ebay. It is cheap, if you don't like it, you don't lose money when reselling. It is not a tablet, it is a laptop, with tablet capabilities.