I've only used the Xtion Pro Live and it works pretty well. I've seen a lot of people using Kinect v2 cameras, so there will be a lot of support for these. They are also higher resolution than the Xtion Pro live and the v1 so will be a bit better. I personally wouldn't buy one of the original Kinects, but it's up to you as they are pretty cheap.
If I was to buy one today I would buy a Kinect v2, because they have good resolution and a good community of support.
Originally posted by fleishman with karma: 56 on 2016-07-07
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Comment by kramer on 2016-07-07:
Also note that the original kinects needed a separate power supply; the Xtions draw enough power from USB.