Hi superflymx6, I have the exact same spec as yours except the case and psu. I am thinking of the TT Tsunami. It comes with a 400W power supply.
Regarding the MoBo, there is a thread under the motherboard forum that compares DFI, ASUS, MSI and Gigabyte SLI motherboard. Originally, I wasn't thinking about buying an SLI board until I saw that thread. The MSI SLI comes with SB Live built-in. Also, the extra PCI-e 16x can be used for some other PCI-e card if you want to. Therefore, you are not wasting your money. Plus, it is only like $40 more than other non-SLI board. I think it is a good buy. It is just my own opinion.
Regarding PSU/CASE, I am still debating what to get. Should I get the Antec Sonata II that comes with 450W PS. However, I really like the look of the TT cases.