Best Mono Amp for $500?

I am looking for an amp to power 2 Arc Audio Flatline 12's at 1 or 4 ohms. It doesn't have to be 2,000 watts. I actually would prefer it not be 2,000 watts becuase I don't want to have to upgrade my electrical. I would guess about 1,500 watts would be good, maybe less.

I can do $500 but wouldn't mind spending less if there are good amps out there for less money. So what are the best/better amps out there? I am looking for something efficient and reliable, that does rated.