If you like free office, get the asus t100 it has a full copy of desktop office.
I got the asus t100 so I could play steam games like half life 2, portal, and civ 5. I know that people say that bay trail cant run games, but all the source engine games run great.
Another reason why I got a t100 was price. At $349 with a keyboard, it blows away the surface 2, which is $449 without a keyboard.
I mainly use the T100 as a tablet, however it is nice sometimes, how I can just go use the desktop version or install chrome and desktop apps.
In the end though it is up to you, I just think it would be better for you to get a t100 or an hp omni 10, because then you dont have to worry about if surface rt is going to be discontinued or not.
Also, check out the new 8 inch tablets like the dell venue 8 pro, I dont have one but I heard they are great.