As an FYI, the 700 will support a "flex" slot where either a second SFX PSU or PCIe device could be installed. My only problem with this idea is that if a second PCIe device is used, you'll probably need an additional PSU anyway as SFX only goes up to 800W. I'm thinking of making another "flex" slot on the mainboard side that would allow HDD/SSDs or a TFX PSU. That way you could have a SFX and TFX PSU plus the additional PCIe device. Otherwise, I may have to change the entire design to support an ATX PSU.