I think I'm mostly settled on most of the set up, but still not sure on which speakers.
I don't have any of these parts yet, but after a few hundred hours researching this is what I've come up with. Let me know if you have any other suggestions, or ideas.
$785 Helix M Four DSP (4x100 for wideband and woofer)
$210 SFB-1000D (sub amp)
$320 SD-4 10" (probably going 2ohm, to get better efficiency from amp and 1ohm future dual option)
$180 Wiring (Knukoncepts amp, speaker, rca, metra harness)
$180 Sound Treatment (NVX silicone Baffle, NVX 90mil Butyl, Noice Red 150mil)
$100 Sub Box & Speaker Adapters (DIY, ply, glue, terminal etc. Will coat with Duratex)
Speaker options
CDT Unity 8 & CL-69
AudioFrog GS25/690
HAT U2/U69
Audible Physics Aries SK3/SK8 (8" woofers up front!)
Audible Physics Ram 2 & ?
I like the idea of Widebands in the Tacoma OEM location to keep more of the sound above the dash, and they would be easy to upgrade to a 3 way setup if I wanted in the future. CDT is the lowest price option at only $225 for refurb widebands (supposedly only scratch/dent), but I'd hate to spend all this time and money to handicap myself with bad speakers.
Thanks for any help or suggestions!