I've blown a few speakers in my 2004 Jeep Grand Cherokee Limited. It's factory set up is the premium sound system setup on this page. I don't want to end up buying speakers that don't provide the maximum amount of power I can get with a 180 watt amplifier, so from what I've read so far this is what I should do. 2 6x9, 2-way, 4 ohm speakers in the front. 2 6x1/2, 3-way, 4 ohm speakers in the back. Leave the factory tweeters. Like I said, though. I'm not entirely sure what the best I could get is. I'm a big fan of Kicker speakers, but they're typically pretty expensive. I just want the best speakers I can get for the lowest price. Thanks in advance.