Besides which, the BIOS update install should leave BIOS at default settings anyway.
I don't think it does - I seem to remember settings staying the same on boards I flash (when I forget to reset it). Plus, if memory serves me correctly, I had to perform a CMOS clear on my Abit IC7 before a new SATA option showed up.
I might do a BIOS update myself to confirm the above. :D