In your experience, is crutchfields the way to go?

I e-mail them for help and this is what they sent back to me:

Crutchfield Cart

But I was hoping to install component speakers to take advantage of the fact that my car is already set up for those, so crutchfield suggested these:

Pioneer TS-A1304C 5-1/4" component speaker system at Crutchfield.com

Your thoughts?