Default Looking into a Windows RT Tablet perhaps....

So I want to get a Windows 8 tablet. I currently have a Asus TF300T (android) and I'm not quite happy with it. I want something that's actually productive. I do a bit of photography and saw that you can connect to a desktop with your tablet and work remotely (I need to look more into this) I figure I could use this and not actually put the images on the tablet or Lightroom. The only thing I see a draw back with the Surface RT is no pen support this is something I would really like. Does anybody have any suggestions on an RT or full windows tablet that has pen support. I'm looking at used Surface RT tablets for around $300 and would like to keep it around there. I have also seen the original Surface Pro for around $500 ( at that price I'm going to have to convince the wife )