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Apparently, some of the Dell displays with IPS panels aren't bad, but I don't own one myself so I don't know. Ever think about a refurb 24" ACD? A little more than any old monitor, but much less than a new 27" ACD.
 
The Dell Ultrasharp line is great value for your dollar. I have a U2311H and the quality is just amazing. Seeing how I paid $215 for it, it's a steal.
 
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