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Here's what I currently have.

Deck: Alpine CDA-7897
Speakers: Alpine Type-S 6.5" Coaxials
Subs: Resonant Engineering RE12s(2)
Amp: Kicker KX350.2

Here's what I plan on getting sometime within the year.

Deck: Alpine CDA-7897
Rear Speakers: Alpine Type-S 6.5" Coaxials
Front Speakers: Elevation Audio Concert Series 6.5" Components
Front Speaker Amp: Coustics 360u
Sub: Resonant Engineering XXX 12" Sub (What box is best for SQ? I think Kiki mentioned somewhere that Aperiodic is best, though this seems like it really hard to get right)
Sub Amp: Hifonics BX1605D

This is a long time in the future before I can gather all this, so I have tons of time to shop around and junk. I'm gonna buy the components first though since I have no front stage yet and have the Coustics amp just kicken around. After that though I'm gonna buy a newer car then work at getting the rest of the stuff.

No thoughts?

great system so far, but here are a few suggestions;
look for a better amp to compliment a nice system you have there.
Coustic is ok but not on the level of the rest of the system if you want a good balance.
Aperiodic just takes a lot of time to tune by ear or meter.
Also you lose 3dB compared to sealed in SPL, but very good for driver control. You also need a car with a trunk to use an AP box unless you don't mind cutting holes in your hatch back and venting to the outside, which causes issues with weatherproofing.

that hifonics amp is a bit low rent for lack of a better term as well. for that sub it really deserves a better amplifier. more reliable, more clean power.

it would be to your benefit to save up a little more and go with better power sources.
also consider electrical upgrades to feed these amps if you go this route, and a good alarm system to protect the investment.

What sort of amps for the sub and speakers should I be looking at?

I found these on the DLS site. Couldn't find prices for these, but I assume they're on the expensive side.

Ultimate A6 Mono Amp - 1200W at 1 Ohm (If I bought this amp I would go with the Dual 1 Ohm Version of the XXX)

Ultimate A2 2 Channel Amp - 85W at 4 Ohms, 145W at 2 Ohms (Would these work for the Components?)

Classic CAD15 Mono Amp - 1600W at 1 Ohm (Same deal as the Ultimate A6)

What companies should I be looking at for quality amps? Elevation has the 1500Wx1, 899$ MSRP?

you'd want the dual 2 ohm XXX. that's how it comes normally.
the coils in parallel give a 1 ohm load, which is what you'd want with either mono amp.

that 85x2 is plenty of power for components as well.

Oh really? Beauty, I thought the Dual 2 Ohms made it just 2 ohms rofl... What a retard I am.

Thanks Kiki!

2 ohms per coil.
two coils in parallel.
2/2=1 ohm