Tough question to answer completely, but here goes.
Since you "do mostly 3-D" (I have done my share as well), what you most need, if your are rendering the images or animations yourself, is a monitor that covers, as close as possible, the NTSC gamut, which is larger than even the typical "wide gamut" monitor. In the alternative, at least have a small real NTSC gamut "video" monitor to also check your work on, in addition to your primary computer monitor which can vary significantly from a true video monitor by gamut, format or resolution.
Secondly, their are many different definitions of "wide gamut," usually expressed as a percentage of one particular gamut, and you should understand the definitions of the various gamuts, their relationships to each other (usually expressed in colorful graphs) and their significance. Do some research on the web. Bing and Google will be your friends. Note that a true NTSC gamut monitor requires a bigger or "wider" color space than even one which can display 100% of Adobe RGB, usually the gold standard for wide gamut monitors. Therefore, it would be best, if one does high-end 3-D which is destined to be mixed with video or displayed on video monitors, to choose a computer monitor with the widest possible gamut, to get as close to NTSC as possible.
Three last things. Make sure you have the proper monitor color profiling tools, from either the monitor maker or from companies like Xrite, and learn to use them correctly and often. And, it would be best, if you do get a good wide gamut monitor, that you also get a monitor/profiling system which can fairly well simulate narrower gamuts, especially SRGB, so that you can accurately guage how your work will likely appear on the "average Joe's" home or office computer monitor as well. About uneveness of color across the screen: don't underestimate how awful this one flaw can be; it will have a very negative effect on your work, both in possible color errors, and/or the extra time needed to "move around" your images on the screen to check color. I would never accept a monitor that had more than a trifling of uneven color, no matter how big the screen.