This is not true at all. Tridef is software to run HD3D or 3D Vision monitors in real 3D. I've used the software as well as Nvidia 3D Vision software with the same hardware, and it works.
As far as the OP's question goes, that monitor is a 3D Vision monitor. Most will not support AMD cards and the ones that due, only support it through HDMI, which would be limited to 720p.
The price of that monitor may be worth skipping 3D, otherwise you probably will want to look at Samsung's line up. They appear to be the only manufacturer that is supporting AMD HD3D with the active shutter system. Besides Samsung, all other HD3D systems seem to be Passive or limited to 720p.
Edit: If you had a friend with a 670 or 680, you might see about trading them to try it out, or just make sure to buy Nvidia on your next GPU purchase. I find 3D to be pretty awesome, but not everyone agrees, though most who don't never tried 3D Vision.