I want to get a better sounding audio system for my 96 Pontiac Bonneville. I have a Sony CDXGT350MP stereo unit which only has 17w rms output x4. Currently My car has 2 rear 6x9s 2 door 4inch speakers and 2 door 2 inch tweeters. Since the stereo only has 4 outputs the tweeters aren't even hooked up (I bought the car used so I didn't set it up like this that's how it was when I bought it). So what would you recommend to get the best sound for my money. Id like to spend around $100 but if the sound is significantly better for more I would consider it. Also is there a way I can hook up the tweeters even though the stereo only has 4 outputs? Any help is greatly appreciated. I was looking at these but I dont know much about car speakers.
JBL GTO938 6 x 9-Inch 3-Way Loudspeaker
JBL GTO428 4-Inch 2-Way Loudspeaker
Sony XS-GTX6932 6x9
I also could get an amp if I would get a large improvement from one or maybe get an amp in the future. If someone could recommend a good amp too that would be awesome.