There are mobos out there with USB 3 ports on the back....but standardized headers for cabling to from case ports or card readers? The only AM3 one I know about is from Asrock. Have yet to see one from ASUS, MSI, Gigabyte..etc. That should change by mid year.
For photography purposes, I do not see a need for the hotest Intel or AMD CPU or hotest video board. It is definitely not needed to run LR, PS, or Elements. So if you want a hot CPU to run games or other applications....great. Everyone knows their own budget.

