I have 2 sets of Infinity Kappy 50.7cs 5-1/4 component systems that I originally purchased for my Mustang GT but never installed. I see the Titan can use either 5.25 or 6.5 components. I have an Infinity amp that should run these 2-ohm speakers with no problem. Does anyone have any experience with these particular speakers? Are they any good or would you recommend something different?