AlpineGuy2Fly

Planning on purchasing the new Apline swr-12d4 but going to start with one sub and plan on going to buy two later! I'm looking for an amp that is going to work with one or two of these subs! I'm interested in your guys opinion on a cheap (but still good) amp and one that you believe is the best for the setup of one and/or two Type R's if interested in getting a second in the future! (Btw I have only 4 gauge wiring and would rather not rerun wires)

And if you guys have any other suggestions or hidden fees I might need to consider when running 2 Type R's

Thanks