Dell is selling the UltraSharp U2313HM 23" e-IPS monitor for $239 (+ tax, but free shipping) on Ebay. I don't know how long it will be on sale for, but they say limited time & limited quantity. This is sold directly from Dell on Ebay so you do get a 3 year warranty.
I've been looking at upgrading for a while and this monitor has pretty good reviews. It's not the greatest, but it's much better than what I have now. I've been watching the price and it's been offered on dell.com with a $50 discount off and on. This sale on Ebay is $80 off and includes free shipping (which would've been $19 for me). It's supposed to be really good for gaming as well as it has almost no input lag.
Specs from Dell:
DISPLAY
Panel Size: 58.42 cm
Aspect Ratio: Widescreen (16:9)
Panel Type, Surface: IPS (In-Plane Switching), anti glare with hard coat 3H
Optimal Resolution: Full HD resolution, 1920 x 1080 at 60 Hz
Contrast Ratio: 1000: 1 (typical), Dynamic Contrast Ratio: 2 Million:1 (Max)
Dynamic Contrast Ratio: 1000: 1 (typical), Dynamic Contrast Ratio: 2 Million:1 (Max)
Brightness: 300 cd/m2 (typical)
Response Time: 8ms (gray to gray)
Viewing Angle: (178° vertical / 178° horizontal)
Color Support: Color Gamut(typical):82%(CIE 1976)5
Color Depth: 16.7 million colors
Pixel Pitch: 0.265mm
Diagonal Viewable Size: 58.42 cm (23-inch wide viewable image size)
Preset Display Area ( H x V): 509.2 mm x 286.4mm (20.04" x 11.28")
Backlight Technology: LED
CONNECTIVITY
1 Digital Visual Interface connectors (DVI-D) with HDCP
1 DisplayPort (DP)
1 Video Graphics Array (VGA)
1 USB 2.0 upstream port
4 USB 2.0 downstream ports
DC power connector for Dell Soundbar