Charat, cc’d here, will be creating the desktop image with me and working on the desktop deployments with the team.
I forgot to confirm an item with you this morning.
Do you want to install 32-bit or 64-bit Windows? I recommend 64-bit so you can fully recognize all of the memory of your systems. If you use 32-bit on the 4GB systems you may see significantly less memory than 4GB available. This is due to PAE. For the 8GB systems you must use 64-bit to fully see the memory.
Also, the same question applies to Office 2016. Do you want to install 32-bit or 64-bit Office 2016? Microsoft has information to help customers choose. https://support.office.com/en-us/article/Choose-the-32-bit-or-64-bit-version-of-Office-2dee7807-8f95-4d0c-b5fe-6c6f49b8d261