The pictures and measurements would be appreciated!
I did see these guys --> http://www.pioneerelectronics.com/PUSA/Car/Speakers/Speakers-By-Size/TS-G1045R
But I'm still checking out the audio world to see what else is out there and can be dropped in easily.
Great info, thanks for posting! I can't find any specs on those tweeters that come with the 609CS's. Do you know what size tweeters would fit up front in the dash? Would 4 inchers fit?