To buy or not to buy?

I'm looking at a steal of a deal on a 19 inch LCD on newegg.com. I am having a hard time deciding on whether or not I really should buy it. I am leaning toward buying it because LCDs are so convenient when moving your computer around and taking it places. They also save on valuable desk space. Hmmm... unless someone has a good argument on why I should not buy it, I think I will.

This is the one I am thinking of buying: http://www.newegg.com/Product/Product.asp?Item=24-168-005

EDIT: Too late. I did it. I bought the thing. Another impulse purchase that I could have lived without.... oh well... it will be nice to have.