Nohing wrong with easy, but do a test
I do understand the headache when a system does not work anymore due migrating. Therefore most It are affraid of. But Ubuntu matches perfect in a Ms network, with or without domain, as client desktop. (I have not tested the other way around linux server ms client.) Have a machine running in your business (company) with Ubuntu and let people test it with no previous notice. You will be amazed.
I know and a grew up with the pitfalls of Linux, but in someway Ubuntu Ubuntu 12.10 has improve a lot in user friendly OS.
Please be sure that I'm not a linux fanboy. I run and automate both OS, Ms office and libre office, Outlook and Thunderbird, Ie and Firefox, and so on.