Coming from a TN display, which of these would offer me more of an overall upgrade? With an AMVA Display (S2440L) are viewing angles as bad as a TN where as if i move horizontally or vertically even a little bit the color/contrast will shift dramatically like a TN will, or is an IPS monitor needed for such a thing? What kind of blacks would the IPS U2312HM give me compared to a TN? Is it very noticeable?