I'm helping a friend out currently with some networking stuff in his studio, and I settled on a Dream Machine Pro instead of a Mikrotik based simply on the fact that I can't support him full time and there's no way he'd get his head around the Mikrotik.

So far, my experience of the DHCP server built in to the Unifi is that it sucks, big time. Bare minimum functionality, it seems. I'd probably stick with Windows (can't believe I'm saying that!).