Unless your thinking about buying an Amp and getting something decent up front, i'd just look for a standard set of speakers for the car.
Getting an amp will open up the possibility of getting alot better speakers up front. You can probably get a cheap but more than capable one off ebay like i did. The MRP-T130 i believe mine was cost about £20 each off there, but they're 2x90W RMS.
You can even go one further like i did and create custom baffles for your car. You can fit 17cm speakers then. A few people have said they look very oversized though but they are better technically than 13's! Sound great aswell.