I am kind of partial to MSI mobo's but if that is what you are comfortable with go for it. I like gigabyte because they have a good amount of copper. You might want to get a mobo that has usb 3.0 on it too. And i would go with the ATI 5850 over the 5830 you can see some of the prices are getting back down to 300 and below for that card and if you want this rig for gaming the 5850 destroys on 1080P. Overall the Rig looks nice though, so enjoy it. Also when i made my similar build i had a hard drive problem with windows 7 and my WD caviar blue HDD, if you ecounter a problem where windows 7 will not read your new hard drive just RMA it the new one should work. And if you decide to overclock this right a bit the Coolermaster Hyper 212 is a great cheap heat sink.