I am purchasing a new stereo head unit for my SRT6 convertible.
I am wondering if the existing door midrange and tweeters are fair, good or excellent quality? With a good quality deck like the Kenwood above, are they worth changing out with some excellent speakers?

Has anyone installed an underseat subwoofer? How did it work out? Which one?

Also, what are those two speakers behind the seats? Full range or woofers? How are they removed? Are they worth replacing?