I've got a 24-inch ACD as well, picked it up off craigslist for $399 (the seller actually gave me a dollar back when I gave him the $400 - ha!); prior to selling my 27" ACD (due to spatial needs) I did an ol' side-by-side examination. Certainly, there were no dramatic differences - why should there be? Aside from increased screen real estate and slightly smaller text/icons on the 27" - both monitors were comparably similar, and excellent.