Just got this for Christmas. Will marry it with the Phoenix Gold rsd6.5 components fronts and rears as soon as the weather warms up a little. Anybody have experience with this amp? Amp has a built in Speaker Level Input. Anyone notice a sound quality differences between using this method rather than using a line out converter? Should I run the center speaker with the fronts or leave it with the factory amp? Lastly I plan on keeping the factory sub, do I just keep it wired to the factory amp? Please chime in, thanks