Hey Sidd,
Yeah I do agree with you as well on everything you've said. Glad to see that you too agree with my 'all or nothing' philosophy. I would differ in opinion for speaker placement, but not disagree. Kick panels as we know are a good option for adding speakers, but since the woofer and mid are close enough together already in the doors, you could place the tweeter there too instead of a kick panel for more of a stock look, and I think you might get a little better imaging out of it too. The cool thing about the kick panels is that you assemble them with your component set and you have proper imaging, in that spot, and you're good to go. I'd rather put the whole thing in the door in stock location, for a stealth look, and also the sound would be a little closer to your ear and treble should be clearer. I only say that because the tweet wouldn't be blocked by the dash and underhang it has. The firing of the woofer in the kick panel would be better, but bass is bass, you hear it wherever you put it. Also a kick won't give you the option for running a 3 way set. I just don't like speakers at my feet where I can ram my foot through them

. Bottom line, both door location with relocated tweeter and kick panel options are good, I prefer the door.
Sidd, you obviously know what you're doing if you ran an Eclipse head unit! A lot of guys will poo poo them because they're not on commission or because they think Alpine is better, its not. Alpine runs 4v, Eclipse now has 16. Eclipse's entire mission is to beat Alpine in everything they do, and they're doing a good job at everything, except marketting. They make GREAT stuff. If you want a killer sub, go to adireaudio.com and look at the Brahma series subwoofers

. Amazing, and the best sub I've ever heard. A near flat BL curve and somewhere around 27mm XMax. Dan Wiggins, the owner, is a friend of mine so he showed me the subs in action and its the sub I run in my porsche (the 10").
I run that and Peerless drivers in my doors with an Eclipse 7002 lcd head unit. Zapco Studio 150 for the sub and Studio 204 for the components are to be next. The mercedes is completely stock, except for a planet audio amp running a couple subs in the trunk for temp usage. Pretty neat being able to add a complete sub setup without having to tear up any carpet, or run any wires outside of the trunk

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So Homey, let us know how it goes!