Bose car speakers are OK, but realistically you have better options. I am not a fan of pioneer speakers off amplifier power, they tend to lack mid bass. It really depends how much money you want to spend. A good choice would be Kappa Perfects, Polk Momos, Eclipse, Focal, and then Alpine Type Rs (what alpman is running, i am working on getting the same speakers installed). Here is my general synopsis of each:
Kappa Perfect - Amazing speaker, awesome mid bass, a little pricey and power hungry (100 rms)
Polk Momos - Quality high end speakers, a little too much tweeter
Eclipse - Same as Polk
Focal - Very clear speaker, not so great mid bass, power hungry
Alpine Type R - Very similar to both Polk and Eclipse, just a more balanced speaker with good power handling
I have used everything in that list except the focal in one of my cars. If you can afford it the Kappa Perfects are the way to go, but you will spend a lot getting an amp to power them. Alpine Type R's would be my suggestion for a good all around speaker.
Kappa Perfect - Amazing speaker, awesome mid bass, a little pricey and power hungry (100 rms)
Polk Momos - Quality high end speakers, a little too much tweeter
Eclipse - Same as Polk
Focal - Very clear speaker, not so great mid bass, power hungry
Alpine Type R - Very similar to both Polk and Eclipse, just a more balanced speaker with good power handling
I have used everything in that list except the focal in one of my cars. If you can afford it the Kappa Perfects are the way to go, but you will spend a lot getting an amp to power them. Alpine Type R's would be my suggestion for a good all around speaker.