if u're getting monitors with comparable specs (i.e. aperature grill vs. aperature grill, not aperature grill vs. shadow mask), then viewsonic is better, but not better priced.
assuming u're not some sort of videophile/graphics professioanl, u won't notice much of a difference between both of their aperature grill pitch monitors...
and since KDS is cheaper, i'd go KDS...unless the price difference is negligible, then i'd go viewsonic...(which is what i did)