Ok Guys and Gals , i am sorry if I am beating a dead horse ,but anyway . 2007 Titan 4 dr truck,looking to upgrade the stock 6 disk system that is in there . The truck is a SE ,with the regular system in it .What way can I go to get the best sound possible. If ya'll could help me with what size wires for speakers ,power and where to get the power from . Thanks in advance for all your help.