Sorry, but I haven't actually asked what this computer will be used for?
If you're talking about LCDs, then a 8ms or lower response time is always nice, and the size is dependant on how much you've got to spend. I personnally prefer CRTs, although they may be bulky, they don't have a lot of the drawbacks of LCDs.
2GB of RAM is the recommended amount ATM, that motherboard takes DDR2 si I would recommend this RAM: http://www.newegg.com/Product/Produc...82E16820208283
But if you are running Vista (as I have found out), upgrading from 2GB to 4GB speeds general multi tasking up a bit.
4GB can be had for as little as $66: http://www.newegg.com/Product/Produc...82E16820211271
I have picked this RAM on the basis that you won't be overclocking.