Running CM11 now.
Was running Archidroid 4.3.1 with no complaints but just had to have a poke at 4.4
So:
Flash CWM recovery 6.0.4.4
Factory wipe
Flash CM 11.0
Flash PA GAPPS full (Dalvik and ART)
Wipe Dalvik cache
Reboot
Clench teeth and remember why I shouldn't be doing this
Enter setup info with disbelieving smile
Watch apps update
Post here
I believe I am below the post count needed to put up links but the GalaxyS3 sub reddit has the links that put you back to the Google community page
There is an OmniRom 4.4 for offer also but there may be booting issues with that
If anything wonderful or terrible occurs I shall update this post
Of course, If running Kit Kat lets me win Lotto I may post from overseas!
-Time to fiddle-