im upgrading/building a new computer. i have some parts allready to use from a past computer and need to upgrade some. I allready have a hard drive (ata 100), a modem, and a powersupply. I need a desktop case with a front bezel and front usb, a motherboard, ram, a proccesor, and a cd-rw. the computer will be used for surfing the internet, doing cad drawings, and typing papers and stuff. the kicker is i also need an upgrade version of xp pro, and office (i think theres like a home version with only word and excel) all this for under 700 dollars. please help