I would be tempted with one of the asus p45 boards which model depending on what extras you need (Asus P5Q Intel P45 my opinion this one is best) . Have found the ASUS Express Gate which allows very quick boot into a linux system to check internet emails etc very useful. Also i would double check power supply i would go for the Be quiet dark power 650w gets good reviews. dont think 500w will be enough for your new system.