Ends 12/6 at 4AM PT. Dell Business has the Dell Ultrasharp U2713H 27" AH-IPS LED Monitor with PremierColor for $1000 - $300 off with coupon code 7CGVJNP4$32V43 [Exp 12/15] = $700 with free shipping. This is the true successor to the professional-grade U2711, featuring 10-bit color support (8-bit + FRC panel) and GB-LED backlighting. If you don't need those features, the cheaper UltraSharp U2713HM is directed at mainstream users.
Dell has the Dell UltraSharp U2413 24" 1920 x 1200 IPS LED LCD Monitor for $600 - $220 off with coupon code $PWG5126T786W? [Exp 12/6] = $380 with free shipping. Found for $450+ elsewhere. Many connections including DVI-D, DisplayPort, Mini DisplayPort, HDMI and four USB 3.0 ports. Here's CNET's review of this successor to the UltraSharp U2412M.
1920 x 1200, 16:10 aspect ratio, 350 cd/m2 brightness
AH-IPS panel, 6ms response time, 1000:1 native contrast ratio
Dell has the Dell UltraSharp U2312HM 23" 1920x1080 IPS LED LCD Monitor for $161 with free shipping. This discount requires Dell Advantage membership (free for anyone to join) or Member Purchase Program (MPP). Check if your employer, school or organization participates. At checkout, enter company name or member ID.
Ends 11/27. NeweggFlash has the Dell UltraSharp U2913WM 21:9 29" Ultra-Wide LED Monitor on sale for $400 with free shipping. Features a height-adjustable stand, tilt and swivel. If you're looking to expand your workspace with a single monitor, this is it.
2560 x 1080, 21:9 aspect ratio, 2mm:1 dynamic contrast
LED backlit matte, 8ms response, 300 cd/m2 brightness
Rakuten.com Shopping with US Micro Corp has the refurbished Dell 24" UltraSharp U2410 Widescreen LCD Monitor for $200 with free shipping. Uses an H-IPS panel for better color reproduction and viewing angles.