Hi there,
haven't tried this board or BIOS but I would suggest that unless you are looking to install an AM3+ CPU then you don't update the BIOS just yet.
The reason I say that is, because of the BIOS chip size, Gigabyte have had to remove some of the other features to allow for the AM3+ CPU's and whilst with your Hexcore processor the core unlock feature isn't so important the disabling of the PXE ROM might be if you BOOT over a network and there maybe other features that have been changed but not mentioned.
Of course, you could always be brave and test it out for other users!