Like it was said above, the quality of the build makes the wheel, more so than the sum of the components. I ran 317s on my Burner, mated to king hubs, for roughly a season. Before that the wheels saw duty on two hardtails. They were built by a quality wheel builder with DT competition spokes. I weighed 195lbs when I first started riding on those rims and I have never been gentle on my bikes. I have since learned how to build wheels and replaced the spokes with CX Rays and the wheels are on my racing bike. There rims have held up great for the past 3 years, were taken down ski lift runs, beaten on highly rocky and technical trails, just finished a race in Moab, they have never gone out of true even the slightest bit. As it was mentioned above, the metal on these rims is very soft/thin, so if you have too little air pressure in the tires and strike a square edge bump, you'll likely bend the sidewalls.
On my 5 Spot I wanted to run bigger tires (2.5/2.3) and ditch the Stan's rim strip, so I have 819 disc rims mated to king hubs with DT competition spokes. I hand built them myself and I've taken them up and down some gnarly trails. The 819 are significantly stronger, they've hit rocks hard on the sides during crashes and aside from deep scrapes don't show any signs of abuse, never have gone out of true.
That said, if you're looking for tubed rims, Syncros D23 are an excellent choice (if you don't mind white). They're 23mm wide (outside), weight 440g and are reported to be ultra strong. DP25 is also great, but only 2mm wider and 74g heavier. If you're going tubeless, 819s are stout and ~525g (including FORE nipples). 823s are even burlier but significantly heavier at 640g (inc. nipps). It's too bad that Mavic won't release the Crossmax style rims compatibile with standard hubs, since they're essentially their current UST rims with additional material machined off between the spokes, which makes them very light.
_MK