The original versions of those firmwares would give you battery draining issues. You need the modified one to prevent battery from draining.
EDIT: just seen yo have a 2008 golf, Your canbus should be a newer version so any firmware will do
I have had 3 B units now and cant complain with them, If you go for a C or above, they will be LED and of course the price will also go up.
Whats your budget?, Ill see if i can source some for you..
Raz