Ok, if you replace the front speakers with better two-way's, do you disconnect the factory tweeters or keep them? Or would it be better to get better tweeters and some other kind of speakers for the doors? Also, has anyone have any experience with Kenwood's KSC-WA62RC subwoofer? This seems like it would be a cool easy replacement for the stock subwoofer. Would it use the stock wireing? I'm not looking for the high-end super killer system, just easy upgrades.