Mine arrived today. Perfect and stunning. I'm not an expert when it comes to calibration/colour etc, but the screen looks uniform and really brings BF3 to life (coming from a Samsung 225MW @ 1680x1050.)
I'm running 5850 xfire and i get POST screens without issue (unlike the Hazro WC which was just an awful awful piece of kit)
Input lag etc seems minimal as i didn't notice any issues with BF3. Also 5850 xfire is sufficient to run the game on 2560x1440 high settings (No MSAA) 64 multiplayer with 50-80fps depending on the map location.
I can confirm that the stand is a bit of a joke and the monitor does tend to want to lean forward if nudged. If you have a wobbly desk i would avoid this monitor if u want to use it as it comes. Thankfully my desk is fitted to the wall so it doesnt move at all and the monitor maintains a nice vertical position.
All in all, after a horrible experience with the Hazro (faulty glass, dead pixels, dirt trapped, no BIOS) i am delighted with what ive seen so far from the DGM. All for £60 less too