yes pull the trigger.
only thing i can mention is that the mobo you picked cannot fully utlize usb 3.0 and sata 6gbps during crossfire/sli. if you are really concerned about this then you could consider asus p6x58d-e.
Also, if you plan to run 2 460s in sli AND over clock you may want to invest in a larger wattage power supply. what size you need would depend on how much you plan on over clocking.
I would prob go with 800w+ b/c nvideas in sli eat power like monsters.
It's just that your ODD link doesn't go anywhere. Get a LG/Samsung/Sony/Asus ~$20 22X drive with lightscribe support.
And oh! Any ATX spec PSU will fit into any ATX case (Mid/Full). Only thing - Your case doesn't have an external 3.5" (floppy) drive bay though, but I guess now that you don't even need those things for BIOS updates, it should be ok.