If you like the Polk DB series, might i interest u in the DB6500 component model. They are very costly but if brand matching is what you're looking for, it's a good choice.

Changing the stock tweeters and putting them in the same place is a major no no, which i never recommend. When you run aftermarket tweeters, you expect to get the most out of them. Imagine this...when the sound is produced, tweeter from the top doesn't come out good. What I did on my 00 accord was mount the tweeters on the door panel. Sounds so much cleaner! Good luck