Thanks for the post, it's awesome to see you able to do well in SQ using the Alpine H701 with just one set of mids! Very cool. Was good to see how you setup the channels for tweets and 'rears' etc. I guess having optical audio just takes away any concerns about interference or loss of quality which is exactly why I'm using the same brain.
I may have gone a little over the top with the plan for mine, as the H701 has a dedicated tweeter channel, two fronts and a rear, I've gone and bought amps for all of them just so I can use all the channels I have all the gear, just need to get the bits for the carputer - take a look at the schematic:
So yeah, not going for the stock look at all, and up till now I hadn't thought about doing any SQ as I know the guys spend a LOT of $$$'s - this system is just to crank the tunes as clean and hard as possible for myself.....
I'd better get a post of my own going as I'll be starting the build soon - FYI, the target of this install is a 2002 Nissan Cube, hence the name, Project: Xtreme-Fidelity Cubed!