Have you thought about the new Microsoft Surface?
(in the spirit of disclosure, my winter work is at a Microsoft retail store)
It has a full version of Microsoft Office 2013 built in from the factory
2 styles of covers- and both have built in keybords!!
full size USB port right on the side
Skydrive- all of your stuff gets instantly synced between computer/phone/surface/web. I use this for billing. And everything else.
built in kickstand-with a cover and kickstand, the form is a laptop.
2 HD cameras- great for documenting work
live tiles on the start screen to keep you up to date at a glance (mail, calendar, weather, everything else)
full IE10 web browser with adobe flash
8.5-9 hour battery life (what I've been getting) and it charges back up in 2
This little rig has been great for me and my business. If you have any questions, please ask on this thread or feel free to PM me!!