I'm upgrading from my 2006 system which has the following: Core 2 duo e6700, 3gb kingston ddr2 ram, 256mb nvidia geforce 7900gs, 120gb seagate hdd, intel oem motherboard, generic 500watt psu. OS X 10.7.5
My new system costed me a little under $1100, with a majority of parts coming from ebay...