Well from what I've read the signal is the same with HDMI, DP or Dual link DVI-D.
I bought a Dell XPS 8500 desktop with 8GB, 3rd gen i7 chip, and AMD Radeon HD 7870 vid card. The vid card has DVI, HDMI, DP ports.
Hopefully it will have no probs running the 30" monitor.
Cheers.