I love my ACD27", it looks gorgeous and as far as aesthetics go, there really is no comparable PC monitor. That being said, if you want a 27" 2560x1440 display, all known displays with these specs use 1 of 3 types of panels:
1. LG.Display 3H panels: These are found in nearly ALL 27" 2650x1440 displays, such as the NEC PA271W and DELL U2711. They use a 3H hard coating which gives text a very grainy appearance. The screens have a very harsh "spakle" effect. I found this to be a total dealbreaker and would NOT recommend any of these. Unfortunately, this also knocks out nearly all 27" displays with one blow.
2. LG.Display Glossy panels: These glossy panels were custom designed at Apple's request. They lack the "grain" effect but will have glare issues in a well lit environment. Only 2 display series use these panels: The Apple LED Cinema Display 27", and the Hazro HZ27WA and HZ27WC. Hazro displays are only sold in Europe and their handling of warranties is questionable in North America. I have been VERY happy with my ACD27", text is crystal clear with no "sparkle" effect.
3. Samsung 2H panel: Future 27" 2560x1440 product which ships this summer. Uses a PLS panel (new technology) which should be slightly cheaper to manufacture than IPS panels. It also uses a grade 2H panel. Thanks to a very mild surface treatment, the SA850 is anti-reflective and also has no "grain" or "sparkle" effect. Text is crystal clear just like the ACD27", minus the reflections.
In summary OP, if you need a monitor now I would get an ACD27". There are NO other comparable monitors unless you purchase a 3H display i.e. the DELL U2711 which have an awful "sparkle" effect. If you can wait a month, however, skip the U2711 and ACD27" and buy the Samsung SA850. It looks to be THE display to beat.