Thanks guys.
The JBL MS-62C's definitely get great reviews.. They are also a popular choice among stereo enthusiasts on the 350 enthusiast forums.. So they obviously can be made to fit in the car.. (I'll have to dremel out my Panels for the tweeters).. but I think the mids will go in the doors with a 1" MDF spacer. I could order the spacers for $20 new.. or gut my factory speakers.. I'm thinking gutting makes more sense money wise. (The magnets on these factory speakers are the size of a quarter, literally).
Regardless of their tweeter design, people say they aren't too harsh.. surprisingly not harsh. Sounds as good as any.. and that's sort of the understanding I'm getting now,.. there are really a ton of options and none of them are particularly "bad" options out of the speakers I've been considering and recommended.