Ah.... "Large"??
Seriously, I have not heard of LG. Which doen't mean much. The truth is that most monitors are made in the same few factories in Taiwan, then wholesaled to a zillion different companies. Only the big boys - Sony, Toshiba, IBM to name a few - really pay attention to what gets their name put on it. These cost more but usually have better quality and warrenty. The cheaper monitors, like cheaper guitars, tend to vary more widely from one to another.
Like I said, try to find a model with a flat or mostly flat screen. Most of these use the same Toshiba picture tubes. The alternative choice are sets that use the Sony Trinitron picture tube. These are vertically flat, have better brightness than most, and usually cost more. Downside of the Trinitron tube is that you get two faint left-to-right lines on the screen, shadows of the two support wires behind the shadow mask.
Make sure that where ever you buy it from has a "no questions" return policy, in case you open the box and wind up with a dog. Actually Best Buy and Circuit City are good places to get monitors, you can often find decent brands on sale for cheaper than mail order. And they don't quibble about returns.
Of mid-priced monitors, View Sonic are a good bet. My favorite home 19" is a "ProView", I picked it up at Circuit city on sale for $250 and have been very happy with it.