Well slight change of plan going on here LOL
Since I have a Garmin GPS already, I'm planning on mounting that in the cubby hole now.
I saw no point in laying down $1000 on an in-dash GPS right now, so I'm going the single DIN head unit route.
At least I can get some better quality sound in the car now, and work on the sub/amp etc etc, when I have more funds to play with
ORDERED:
* HEAD UNIT - Alpine CDA-105 - Single DIN
* FASCIA - METRA Face Plate for Single DIN
* SPEAKERS - Polk Audio DB6501 6.5" Component Speakers
* AMPLIFIER - Alpine KTP-445 - 45 watts RMS x 4 channels
* MISC - Dynamat for doors
TO DO:
* SUB ENCLOSURE - Zenclosures - Rear Facing single 12"
* SUBWOOFER - ??? Maybe - Rockford Fosgate Punch P3D212 12"
* EXTERNAL AMPLIFIER - Unknown ???
The Alpine KTP-445 was cheap, but it does give me 45w RMS over the 18w RMS from the head unit.
So I'm still interested in my original question regarding if I should go for the 1 amp or 2 amps, in the next phase of my subwoofer upgrade.