Lion set is cool but I think the shoulder item could be improved. It doesn't add much silhouette and the solid metal material doesn't really fit Lion to me. Also you used the old Lion model as a base. You need to decompile his model to get the latest version with the spikes and gem on the head.
rynomite: The Rhino kicks ass! Very well done! However, I think the Lion shoulder pad lets the rest of the character down. The Lion looks a bit droopy. - BoBo
you never said which OS, Lion or Mountain Lion? hacked kext drivers or official? nVidia released official OSX drivers for 10.8.2: http://www.nvidia.com/object/macosx-304.00.05f02-driver.html