I have installed many car stereos throughout my years, and the truth is there is nothing wrong with the shaker 500 head unit. Plus I like the fact that I retain all of my sync Bluetooth, steering controls and nav. Jl audio makes a nice summing line convertor that gives you two pre outs which is plenty. It also uses a signal sensing technology to turn on the unit and provides a remote turn on for your amps. The unit really has amazing signal/sound quality and is much cheaper than a new head unit.
2012 GT CS Ingot Silver Vert, Edelbrock E-force supercharger with CAI and 3.5 Pulley, Tremec T-56 Mag, Accufab 84.5, Centerforce DF, Billet Yoke aluminum driveshaft, FRPP 3.73 Rear, MRT Performance H-pipe, Bassani axle backs, JL Audio sound, Edelbrock strut tower brace, JPC adjustable UCA, UMI adjustable panhard bar, KW V3 coilovers, Steeda heavy duty front mounts, Steeda rear LCA's, 20" Steeda Spyders with Michelin Pilot Super Sports, Steeda Big Brake Kit ....... it just keeps going.