Hi Mase, the Charger Pros are pretty much Stan’s Flow rims (23mm internal width, great for making 2.25 tyres look huge!) Sun Ringle make stan’s rims and have licenced the design for the Charger Pro’s so they are pretty much Stans Flows on Sun ringle red ano straight pull hubs. They are presently 15mm front and the optional 142x12mm adapters fitted on the rear (a £20 optional extra I’ll include). All the other end caps are there, so every known combination (apart from 150mm DH spacing) is catered for. They are presently taped up to run tubeless, and I did, schwalbes went up no problems. Not sure if I have the valves, but any tubeless valves will work. They are the new ones with uprated bearings as some people had issues with the 1st gen ones. I’m looking £200 posted.
I’ll put some pics up and provide a link shortly, but they have hardly been used (5 times maybe?) so they look like the ones in this link!!! The carbon wheels are from light bicycle, but a good bit outside your budget.
http://www.mtbr.com/cat/tires-and-wheels/wheelset/sun-ringle/charger-pro-29er/prd_485994_157crx.aspx