AMD dual cores are very good at everything, look into the opteron 165/170 and 175 series.
2 gigabytes of ram, anymore will decrease performance, PC3200 for AMD.
This GPU will work well in your occasional games: http://www.newegg.com/Product/Produc...82E16814130250
An ASUS A8N series motherboard (excluding the SE) or a DFI lanparty or a MSI K8N neo 4 motherboard.
A case you like.
A Antec 550w, Enermax, or a Seasonic PSU are all good manufactueres.
USB 2.0 is standard nowa'days.
UV lights look great with UV cables, and looks very modern. Otherwise a colour of your choice.
Antec and Thermaltake make very quiet cases. I used a Antec Piano Sonate II case it and was so quiet.
A good heatsink to keep the CPU cool with quiet fans. (all copper ones are the best.)
A IDE DVD burner.
Go for a Seagate SATA hdd. Alot of people recomend Western Digital, but I was shocked at the poor build quality of them, that others say is the same on theirs.
Have a look on www.newegg.com
and chose out componets your self. (I get tired of picking out the same components, and how will you learn from me saying 'get this' it adds individuality to your PC.)