im trying to upgrade my current gaming tower with budget friendly parts. i currently have a giga-byte GZ-7VRX mobo but want to upgrade to something newer. i want at least 4 gig max ram, and at least a 2.0Ghz CPU. i already have a 450W PSU and i would like to reuse it, and i dont need SATA ports on the mobo, i have a PCI sata card. what do you guys recommend. i would like to spend no more than $100, it can be either new, used, or refurbed, i dont really care. also, if its a mobo/cpu bundle, that would be helpful. i would prefer either a gigabyte brand or asus brand, but its not neccessary.