Well it has been 20+ years since an upgrade and I already screwed up. I bought a retrosound head unit that is 4x50 rms, Polk DXi650's up front in the kick panels and Polk DXi690's in the rear deck. Very happy with the front speakers and I think they are rated for 60 Watt rms. According to Polk I have clipped my rear speakers, as they are now awful. Wasted $150 and seemed like this where expensive speakers did not match the head unit. The 690's are rated over 120? Watts rms. Need help to determine what to do with the rear. I like the fronts a lot and they fort where I previously had a hole. I'm thinking a sub maybe. I had a bazooka in the past and liked it in a hatchback and I know they are frowned upon at avs. I listen to rock , metal, jazz and like a tight bass. I appreciate the help. By the way the car is pretty loud too so I suppose I need power but not sure how much. Thanks.