Ditch the polk, the kicker stuff is good. Make your own box, you'll be MUCH happier and it really doesn't require all the tools you'd think. You can really do one with just a jigsaw, a drill, and some wood glue. It won't be the prettiest, but unless you're wanting it painted (good luck finding a pre-fab painted) it doesn't need to be pretty. At 1000w you won't be knocking anybody out. With a $2,500 budget you can do much better than that stuff. Try this:
-Two Fi Q 12s Dual 1ohm (
link) =$520
-Two Kicker 06ZX1000.1 amps (
link) = $738
-Phoenix Gold RSd 6.5" Components (
link) = $129
-Phoenix Gold RSd 6x9 Coaxials (
link) = $78
-Kicker 06ZX100.2 amp for the components (
link) = $119
-Can't go wrong with the yellow or red tops for a daily driver, good choice there.
-You can pretty much make your own box for the cost of wood of you have access to the tools I mentioned. Any kind of saw will work, but you need a router or jigsaw to cut the hole for the sub. If you only have a router, you can get lowe's/home depot to cut the boards the sizes you need, just make sure you take the wood thickness into account.
edit: o and all that, if you buy from the places I listed in the links, will total up to $1,584 with the exception of the battery. Add $150 for the battery and you've still got about 200 to work with. Most of that should go towards quality wiring. Check out KnuKonceptz.com for great wiring. If you have a little extra after the wiring, look into some 1/0 wire and do the Big 3. If you have dimming issues, look into a capacitor. (Don't listen to the nay-sayers on capacitors, they have proven themselves 3x over now for me). Why not do your own install? It's not as hard as it looks. Most time consuming part is taking apart/putting together the car.