Greetings, in short, I want to replace the front stock speakers, and I am in a very tight budget. My wife is losing her patience after I spend the money on home theater :cool:

The car is 96 grand marquis, 5x7/6x8 front, 6x9 rear I believe.

Any advices are appreciated.

I would leave the 6x9 rears alone, if they are still in good shape.

Is this going to run off your stock head unit? If so, focus the $100 on sensitive speakers. The stock speakers are very like quite sensitive. Going to aftermarket speakers will sound good and low volume but make sound worse at higher volume, giving a perceived lack of bass.