I looked at the Vivo RT last night, and it's pretty likely I'll own one by monday I'd like to see a surface, but the Vivo has longer battery life with the dock. I just don't have any need for the kickstand, but I'm open to any convincing arguments
BTW, NewEgg is offering the doc for free if you register the device, but I suspect that's an Asus thing.
The Vivo RT is nice, but battery life ... I don't see that as something that should matter to most users, because the battery life on the Surface RT is absolutely fantastic, I haven't hit 20% once, and I rarely have it plugged in.