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One new option that you might want to consider is Google’s new Chromebox for Meetings. It’s much less expensive than the options you mentioned, although to be fair, I haven’t personally used it so I can’t attest to how good it really it. Chromebox for Meetings would cost you $1000 for each location, so you would be looking at a significant cost difference. There was a blog post about it here on ITworld last month and there is also a white paper looking at the system that you might want to read.