Yeah same here my Pro came with 0906 and I flashed instantly to 1206, Then I couldnt get back into BIOS so I flashed to 1015, Its been working really well.
I too am waiting for a new BIOS, Should be anyday.
New Bios version 1401 is up on ASUS's z77 webpage!
And for people that were having problems using the delete key to get into the BiOS on any version. I noticed if you use F8 a boot menu appears where you can choose to "enter setup" which will bring you into the BiOS!
EDIT: Just updated the BiOS. v1401 seems to fix the problem, delete key takes you to the BiOS now.