im in the same shoe as you bro
firstly here are the limitations you should know: 32gb model might not be enough, you cannot install games and apps from the store on your sd card and if you install office, you'll have maybe 5-6gb left and even less after paging file e.t.c
the asus is good but has a lot of problems it seems look here
ASUS VivoTab RT - Windows Phone Central Forums but if you can risk it then why not.
dell venue 8, everyone on here seems to love it, runs full windows, but hasn't got the windows key on the front, i opted for the toshiba encore 8 instead. if the screen size isnt an issue then its the best for productivity because of full windows. but bare in mind im buying a surface rt beause 8" on my encore just wasn't big enough.
Also has an active stylus.
Surface RT.
Best screen, loads of Ports, more likely to get updates for the d?vice i.e drivers. keyboard cover,great for students