I downloaded and installed Sabayon 8 from the following link
Chose the default partitioning options, and then on re-boot it took less than a minute to boot into KDE.
I have then proceeded to update entropy, and update all my packages as per instructions for "Fresh Install - What to do?" http://wiki.sabayonlinux.org/index.php?
I have submitted the following bug report https://bugs.sabayon.org/show_bug.cgi?id=3130
(which has also an attachment of my configuration files).
Though I am yet to have a solution.
nb: I have an nvidia Geforce 7900 grahics card,
nb: Once the system has booted up, everything runs perfectly and super fast.
Thank you for your help.