Ok this is what i'm thinking of going with

Amps:
Alpine MRP-F450 for speakers
Alpine MRP-M650 for subs

Speakers:
Alpine SPS-171A

Subs:
2 Alpine SWS-1042D
or
2 Alpine SWS-1022D
(what's the difference between the two? once says 4 and 2 ohm?)
http://www.alpine-usa.com/en/product...p?category=SUB take a look

Enclosure:
Zenclousre

HeadUnit:
not sure if i want to change this yet

Future:
carputer

i don't really listen to music that loud... and i only drive the car on weekends so i don't want to put an expensive system in. Just something better then stock... which is pretty much.. ANYTHING...

What you guys think?

 

Here, hope this helps:

DVC FAQ by JL Audio

Basically, the different amount of ohms lets you optimize the power from your amp to get the most outta your amp and subs.

I would recommend running a 4 ohm mono load, as this will be closest to your subs rms power handling capacity. Keep in mind, the Type S is only rated to 300 watts rms and the MRP650 puts out 400 watts rms @ 4 ohm and 600 watts rms @ 2 ohms.

To achieve this, you can run two 4 ohm (SWS-1042D) in a series/parallel configuration. The voice coils need to be wired in series and the drivers need to be wired in parallel.

 

definetly run 4ohms please