As a new owner of a Chevy Aveo5, I have to first and foremost say that I love this car. My only gripe is with the stock sound system. I'm a big fan of music (as I'm sure the rest of the world is) and I love crisp, clear music with solid bass. The stock sound system in my car does not provide that. So, my questions are as follows:

How many speakers are in this car?
What size are they?
Are they easy to replace?
Are they expensive to replace?

Any feedback would be GREATLY appreciated. Also, as a new member of these forums, I have to say I'm impressed. You all confirmed my decision to buy such a great automobile!