If you can find one, get either the Dell U2311 or U2312. A bit pricier, but build quality is up there.
Can you elaborate?
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I've only tested a Dell LCD once, and I like the aspect ratio controls of Dell (not sure if most Dell LCDs have it).
With the Dell E248WFP LCD I tested before (this is a 24-inch 1920x1200 LCD), its aspect ratio control settings allow "1:1", "4:3", "16:9", "Fill". In "1:1" mode, if the resolution being displayed is less than the native resolution of the LCD, the image will be displayed "1:1" and centered on the display.

Most widescreen LCDs I've seen only allow a "4:3" and a full (widescreen) setting. I have yet to see another LCD with the "1:1" setting (I know it's generally best to use native resolution, but there are instances when I'd like to check what the source really looks like when it's 1:1).
I've even seen some LCDs (it was an LG 17-inch LCD, the exact model I can't recall) whose aspect ratio controls are quirky (eg. the LCD's native resolution is 1440x900, and you're viewing a 1024x768 old game that doesn't support widescreen, you could then set "4:3" so the graphics on the LCD look "right" and not stretched/flattened -- this is normal. But then some LCDs allow you to set "4:3" even when you're already using it's full resolution, eg. you're displaying 1440x900 resolution on the LCD with 1440x900 native resolution -- yet the screen controls allow you to set "4:3" which results in a narrowed look - not normal.) I suppose it's hard to explain well, but I wasn't able to take pics of these scenarios when I was testing some LCDs before...
Viewsonic's aspect ratio is more normal, but sometimes there are resolutions when it allows you to change aspect ratio, but some resolutions where I think it should also have allowed the aspect ratio control, but it's grayed out... (eg. the LCD's control allows to set "4:3" aspect ratio when displaying 1024x768 or 1280x1024 on the Viewsonic LCD with native resolution 1440x900. But sometimes it doesn't allow the "4:3" mode on certain resolutions, eg. 1152x864 (this is a 4:3 resolution, but the Viewsonic LCD doesn't allow setting to "4:3" aspect ratio in this case...)