Oh Andrew, why did you have to go and confuse me even more! OK, so for someone like me, an amateur photographer, but serious about it, who needs nothing more than getting a pretty close match between screen and print (an R2400) do I want or need more or less? I've been reasonably content with a 20-inch ACD for the last four years, but I certainly can see it's deficiencies.
Do you work with images with saturated colors, those that exceed greatly sRGB OR images with very subtle and important colors that need editing within the sRGB gamut?
Wider is "better" for the first case, not the 2nd.