Oh man you're going all in aren't you
. A lot of things really depend on your needs.
The pen works as a pen but a lot of people who use the surface for real drawing
recommend the Wacom Bamboo. But do you really need it?
Personally I'd recommend getting a
bluetooth keyboard of some sorts, either the newly
discontinued wireless
adapter for your type cover:
bit.ly/1i60ZFZ
Or the surface wedge keyboard:
http://bit.ly/1mkuTZR.
If money isn't a problem I'd buy a logitech wireless keyboard and mouse combo with an unifying
usb receiver:
Keyboard & Mouse Combos - Logitech.
Since you'll get the dock you're pretty much set for ports.
I'd also recommend getting an adapter to plug it into an external monitor or a tv.
An external hard drive wouldn't hurt, even though you'll get the
256GB version after Windows 8 is installed
it will actually have
212 GB remaining. That's more than enough for me, but depending on your use it would be simpler
to keep certain things at home while on a trip.
The mice are comfy but I wouldn't say that they're fit for gaming.
Speaking of gaming, get a
xbox controller for it. Either a bluetooth receiver
if you already have a controller, or a new one made for windows.