What to keep in mind for initial setup - DIYMA Car Audio Forum

I have ordered a Pioneer 80PRS that is coming in the mail by the end of this week. I have taken my old HU out that I just sold on eBay and noticed a mess of wires (radio was installed before I owned truck).
I have
-Boston Acoustics Pro 50 SE 5.25" mids in doors
-2x JL Audio 8" W1's behind rear seat
-no rear fill for now
-and im going to get these Focal Tweets
-JL Audio XD700/5 Amp

I am planning on running my own speaker wire for the fronts (mids/tweets) was thinking just 16 guage from eBay will do the trick. And 12 guage for the subs (they are currently hooked up through 16ga, was not me) and the mids/highs were wired in through the factory wires (also not me). So i plan on running all new wiring for everything.
Sound good? any thoughts...

Gonna run the HU in 3 way of course, and actively run the mids highs and sub. So was thinking of not using any of the processing from the amp but doing it all off of the HU but I don't even know were to start for frequency's, slopes, and everything. Also was planning on trying out the auto-TA and auto-EQ that the HU has.
So what do i need to do?

Source: http://www.diymobileaudio.com/forum/system-design-help-me-choose-equipment-my-car/141042-what-keep-mind-initial-setup.html

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