Upgrading computer, any advice

[longfire]

dont be afraid of building I recently built this pc http://pcpartpicker.com/p/cmBA alone and only read the motherboard instructions for the fan,audio n led connectors xD you dont need a strap for anti static just work on a surface that doesnt have a carpet and occasionally touch metal stuff before handling anything

the builds everyone else recommended are great but heres one thats good and has a new gtx 600 series gfx card and is just a bit over your budget xD http://pcpartpicker.com/uk/p/cmIq
Just saw my recent build is slighty above your budget as well except i reused dvd drives and hardrives other than the ssd from other computers my family had at home and i already had a 64 bit win7 home premium disk sitting unused at home as well. so just a thought