Windows 8 RTM won't install

Hi all,

I've been trying to install Windows 8 Pro x64 on my PC from DVD, but
have failed miserably.

It boots from disc just fine and I then get the blue window image and
white "spinny thing" below. Unfortunately, it sits here for over an
hour before finally moving on to the language selection screen. After
that, it sits there with a fairly generic message akin to "Setup
running" and then just sits there. I left it overnight and it was
still like that in the morning.

I've done a bit of googling and have seen some comments alluding that
it could be an issue with the Marvell chipset in my mobo (a Gigabyte
GA-X58A-UD5 for reference).

I also tried installing from DVD from inside the existing Win 7 OS.
However, I didn't progress too far there either, as in this new
version it seems to have lost the option to decide where you want to
install. I just got asked if I wanted to wipe everything and start
from scratch or preserve the files in the User area.

Any suggestions with regards to booting from disc? Did I miss a trick
with installing under windows so I could pick a different target
drive?