I am in the process of building a new PC. I propose to use the Asus M2N-MX motherboard. I cannot, however, determine what the current requrement for this board might be. Asustek service will not accept queries without a product S/N (don't have the item yet) and there does not seem to be a way to query sales. Other devices are: 1 HDD, 1 DVD/CD RW, 1-FDD, maybe a minimal video card if necessary. I have a choice of two P/S units: 1-KDM M6400/7400 400w --+3.3:28a; +5:40a; +12:18a (APFC=no) 2-Enermax SFX 270w -- +3.3:20a; +5:22a; +12:20a (APFC=yes). So which should I choose for this MB? Any advice anyone?