Sorry for the late response.
The Surface Pro 3s are
x64
4GB RAM
128 - 256GB driver
i5 2.5Ghz
I was wondering what Cosmic had for the 300 Surfaces. 2 or 3?
One last thing. The firmware updates cannot be pushed out if you are using WSUS. The automation with the Surface Pro 3s are not so automated. I had to have the Help Desk flash the UEFI prior to imaging. This makes for a grumpy staff when you have a whole pallet.
Our district is going on Christmas vacation today so I will be back on the research and development after the new year.
Cheers!