+1 Surface RT with Touch Cover, -1 iPad 3 (I'll get a Mini sometime in the future)
After having spent a day with it, I can now see there was an awful lot of Apple ball-washing going on in some of those reviews. This thing is pretty awesome, particularly in usability and productivity.
Other than games/app selection, and the resolution (although that depends on what you are doing, Clear Type is no joke), this is a much better tablet by far. The fact that I can simply connect to my homegroup/network and drag files over (or, even better, just stream them through whatever app 90% of the time) without using a special app or program or iTunes gives it an immediate leg up.
It's not perfect. I don't know how the app selection will play out over time, for one. The OS and built in apps like Office eat up a lot of space - I had around 16GB free to start. Touch cover takes some getting used to. For the next iteration, they need to etch a white line in the space bar - it's a little hard to see on the black cover, and the line would help. I'd also like there to be a true split screen option for apps (although the current 75/25 screen split is useful with some apps). Dunno if there are underlying reasons for not having a 50/50 split as an option, but it would be nice. Most everything I have quibbles with can be fixed in updates. iPad 1 was bare-bones (no multitask, etc) before they updated the OS, so I'm sure Surface will continue to improve on that front.
I like the iPad and Android tablets fine. As pure consumption devices they're great, and both top the Surface in a lot of ways on that front. If you're someone who wants to actually get some work done while still being able to play with a tablet and your budget is $600 or less, though, this is pretty much the only one you should be looking at (of course the pro will be better, but that's $900 for the base model).
If you're thinking about getting one and have any questions, ask away and I will try to see if I can answer them.