Thanks for your input everyone.
We are actually currently using the Samsung Series 7 XE700T1A as suggested, however that line seems to be going through discontinuation - very few stores have new tablets to sell, and I have found none that ship to Canada. It seems all windows 7 tablets are becoming unavailable. Since the medical app requires a tablet, we will have to work with the app vendor to see if they can make it more windows 8 friendly I believe. In the meantime it looks like we'll need to take our chances with used / refurb XE700T1As...