BTW, the "BIOS virus protection" you were talking about earlier is the capacity of the BIOS to operate a simple boot sector virus detection routine, it is not anything to do with protecting the BIOS itself.
BIOS is stored in [acr=Read Only Memory]ROM[/acr], which is why it needs to be flashed in order to change the content.
To protect from a "BIOS virus", all you have to do is disable flash writing when you aren't using it.
The only viruses that can write themselves to flashable devices (and it turns out they do actually exist) cannot affect NTFS or UNIX machines, only work with certain chipsets in particular configurations, and are extremely uncommon. There are none that have no identity description in the AV industry.
Citing these things as a reason to avoid flashable BIOS is no different to citing them as a reason not to have a computer.