What is the best sound system for a '92 Miata?

I just got a '92 Miata for fairly cheap. It doesn't currently have a radio but I plan on get one very soon. I'm a huge music fan and want a system with alot of bass that really kicks. The car does have two speakers in the door but due to the fact that I don't have a radio, I have no idea what they sound like. Being as specific as you can, what speakers would you suggest I replace my current ones with? Also, what size and brand subwoofers should I get that will give me the most bang for my buck? Ignoring price, what is the best combination of speakers, subs, and possibly amps to get a good, strong sound? Again, specifics would be great if you could give them to me. A price range is also greatly appreciated. Thanks in advance!