PC monitors are different than TVs, you don't set brightness with a pluge pattern.
Typically their brightness control is actually the backlight.
If the Eizo does have brightness, contrast and a backlight, then you do have a real brightness control, but you still can't use a pluge pattern due to the fact PC's use the full range all the way down to 0. You can use a pattern like on the AVS disk or the CalPC client to turn it down till something just above black disappears then turn it back up.
White level is usually determined by your viewing environment. Standard overhead lighting, probably 150 cd/m is good, but you could go all the way up to 200 if you feel like you need the brightness. In a dim room something more like 100cd/m is more appropriate.
CalMAN Lead Developer