No such thing as "deep blacks" on ANY LCD, of course perception of "deep blacks" is subjective. I think the blacks on the ZR30w are actually quite good for a LCD..
Could not be further from the truth, unless we are only talking about 24"+ IPS. Perception of black depth is only subjective if one has never seen a display with deep blacks. HP ZR230W black level of 0.31 @210cdm/2. Blacks are not even close to being deep, contrast ratio stays around 700:1 across all ranges of luminance which is well below average. The HP ZR30W requires calibration from a Wide Gamut compatible colorimeter, the OP said he wanted accurate color and deep blacks and the HP provides neither. We get it you like your display, but come on........
All of these input lag measurements being refered to are wrong due to inacurate testing methods which lead to higher averages due to the "lag spikes," which do not actually exist. The monitors with scalers will have over 1 frame (16.7ms) while the ones without will have even less. Head on over to PRAD.de for the real numbers.