I have a (circa 2006) HP Media Center PC m7757c with P5LP-LE Leonite GL8E motherboard and 500w psu. Intel Core 2 E6400 (2.13gHz cpu). Mobo is limited to 4gb of ram. Wondering if upgrading motherboard, cpu and ram is feasable. If so, what most current motherboard would be a good solution to upgrade, utilizing original case? Preferably Linux Compatable.