rrday unfortunately the intuos 4/5 pens don't work with the surface pro 2, the digitizer inside the SP2 is older than the intuos lineup. There are however happy alternatives. Wacom of course capitalizes on this with the Wacom Bamboo Feel / Carbon here http://www.amazon.com/Wacom-Samsung-Microsoft-Surface-technology/dp/B00BVUQZZ2/ref=pd_sim_sbs_cps_1
I have the Carbon which is a little heavier and bigger, I almost find it too big but the weight is pretty awesome. I also picked up an old ArtZII esque pen (not the best link but this is what they look like) http://www.amazon.com/Penabled-Tablet-Pc-Eraser-Pen/dp/B000085BDB/ref=pd_sim_pc_9
You can use any wacom penabled / artz era stylus.
I've been very happy with my drawing experience on the SP2, you'll love it.
p.s. I should mention that the Bamboo Feel and ArtZ style pens have their cursor position a bit different from the default pen. The default pen has the cursor tip basically under the tip of the pen. The wacom pens have their position slightly forward, similar to what you'll find on a Cintiq, which I've found I prefer for drawing.