you never need a driver for a monitor, but if you do use the driver that comes on the cd with the monitor it just loads the correct colors and settings from it(no big deal if you don't use it though)
something like a 19" monitor would do fine for you but please try borrow a monitor first though!
ASUS 19" widescreen $139 after rebate $109
http://www.newegg.com/Product/Produc...82E16824236029