if those r single 4 ohm voice coils then you need a 2 ohm stable mono amp not a 4. a good choice would be a jbl 1200.1(which puts out about 1200rms at 1 or 2 ohms) or a hifonics bx1500d(which puts out about 1000 rms at 2 ohms).there are other amps u can look at but these two are awesome amps both r around 290 shipped. good amps for the money.
By the way, that amp is basically made by Audiobahn, notice the bling. Alphasonik is just a subsidiary of Audiobahn, and not that great. The Eclipse amplifier that matches perfectly to these subs is the DA7122, which is a fantastic amplifier and will push those subs very well. You can probably find one on ebay around $500 or a little over.
Whats some good web sites with the best prices for the Eclipse amp, JBL 1200, and the hiffonics.
Also what is the diff. between the 2ohm mono amp and the 4 ohm?
Your subs are 4 ohms each, I don't know if you know Ohms law or not, but when you connect two resistive devices in parallel (in this case two 4 ohm subs) this creates a 2 ohm load because the current has more paths to flow (the same as if you used a Y-fitting on a water hose, the water will have more places to go, less resistance). This means that with a mono subwoofer amplifier, you'll need an amp that supplies the necessary power on a 2 ohm load, in this case 1000W @ 2 ohms. The amp's aren't 2 or 4 ohms, they're made to produce power, and the load put on them is what determines how much power the amp puts out, a 2 ohm load has less resistance, generating higher power from the amp. http://www.sounddomain.com has decent prices on Hifonics and JBl, and if you find them cheaper on another site, sounddomain will do a price match. http://www.woofersetc.com has the Eclipse and JL Audio amps, but they're more expensive, both are fantastic amplifiers, though, and will push those subs very well.