Get the 30" NEC. Better and cheaper than the ACD.
But have you check out HP's new back-lit display the DreamColor LP2480zx and Samsung's XL30 LED-backlit 30-inch monitor, I think Apple may be next and I want everything Apple I have a 3.2GHz 8-Core with 512MB 8800GT and I want a Apple display to go with it but the NEC does look nice just wish the NEC, HP's LP2480zx, Samsung's XL30 came in aliumum silver design that will match the Mac Pro even better, but thay all come in black and it doesn't look right with a Mac Pro, I look at so many manufacturers like Dell's 3008WFP, Gateway's XHD3000, Samsung's 305T, Eizo CG301W,HP LP3065, and the Apple Cinema Display HD and at out of all of these displays the Apple Cinema display just looks better than all of them but not in the spec's,their lagging in that area but I hope by the end of this year or at least some news that Apple is working on a new displays but Apple is always tight-lip on upcoming products and I don't want to be the person that buys a 30-inch now and regret it later and wish that they would of waited a bit longer, I have a 17-inch I can use temporary until Apple does decides that their coming out with a new display, i'm not in that big of a rush to buy my 30-inch just waiting for the right time to buy one