What would you do?

My current system: Aerial 7Ts, Parasound A21 amp, Parasound P5 preamp, Wireworld Silver Eclipse interconnect from preamp to amp, Wireworld Gold Starlight 7 digital cable from NAD 565bee CD player to preamp, Wireworld Silver Electra Power cords, and PS Dectet power conditioner. Room treatment with GIK, room is 20'x 24'.

My options are to get new speaker cables, to add a JL Audio F112 or is a new source the answer?