i have an Acer, works fine, great brightness, plus it came with a 3 year warranty.
i mean Viewsonic and NEC are very good too, just ask us which monitor you plan on buying and we'll tell you if its good. the brand isn't always what matters, sometimes the model is bad too.
for instance, asus makes probably the best motherboard on the market, but their cheapest motherboards are the crappiest ever. lol