I have to agree here.. try and go for QUALITY over QUANTITY. Just because it has a lot of watts does not mean it will sound good. Stick with a name brand if you can, in the long run it may be worth it to spend a few extra bucks to get a name brand instead of a no name.

I use a Clarion 300 watt amp for mine, complete with the stock speakers in my car and I am satisfied. Of course, replacing the speakers with some that are rated to handle whatever watt amp you use would be a good thing, you dont really have to worry about blowing the speakers then. Not to mention that a good set of speakers will probably sound better than whatever cones the manufacturer put in your vehicle originally.