I'm still a big fan of Dell's UltraSharp monitors. The U3011 was on sale for $1012+tax recently. The U2410 is a terrific monitor for under $500. The U2311H is a screaming deal for under $250.
Comparison shop for an NEC SpectraView or a Lacie, and you'll see what a deal Dell offers on IPS LCD panels.
i7-2600K, H70, P8P67-M Pro, 16 GiB, HD7950, SSD, 3 HD, Blu-ray, X-Fi Ti Pro, Antec P182, S75CF, 3007WFP+2001FP, RK-9000BR, MX518
i5-3570K, GeminII-S524, P8Z77-M Pro, 16 GiB, HD7770, SSD, 2 HD, Blu-ray, InifiniTV4, NSK2480, 55" TV; Asus UX32VD