Ok guys, here it is... after owning my 93 300E for only a few weeks, I've got a preliminary system design going. I've attached the image below.

Does anyone have any recommendations?

The differences between this image and the updated version is that I've moved the distrobution block from the engine compartament to the trunk, and I'll be mounting it on the amp rack. Also, I think I can get away with an S-Video splitter instead of a repeater. Let me know what you think.

I'll be renaming the items as I find the exact parts and manufacturers I plan on using. The Orion XTR's and the PPI amp are existing (and free ), so I won't be changing those. Yes, the speakers are odd sizes, I'm looking to keep the stock look, so I'll go up if I can do so without changing the grills, otherwise I'll find exact replacements, or go down a bit (which I'd rather not do). Fronts are 4 5/8", rears are 5 1/9", and the existing speakers in the doors (just one per door) are roughly 6 1/2". I'll be modifying the door panel to include two speakers.

Here it is, let me know what you think: