It really depends on what your plans are for the system as a whole. If you are planning on running an amp to your door speakers then I would say go for a mid to high end speaker like MB Quart, Boston Acoustic, or JL. If you are just running the power from the head unit I wouldnt bother spending too much on the speaker because you are never going to get it to reach its full potential. I run the JL VR 6.5 components, they are really affordable and can handle 100w per speaker. I run 75w to them and they have great sound. Anyway there are a ton of good speakers out there, the important part is to match the rest of your components so they sound the way they were designed.