i have had no problems with bios14 beta, but i see a few people with bios14 having trouble like not overclocking as well after they flashed from 14 beta to 14.
i guess all we can do is wait and see, what happens next.
The beta bios has given me no problems, in fact it's helped my stability and overclock. One good thing it did was fix some voltage issues I had -- before the beta bios, it would not post at certain voltages, such as 1.8, 1.85... now that stuff is fixed.
I can't speak for the SATA controllers, I haven't used them at all yet.