You just don't realize how much you need to know when you look into getting a system.
The ohm load from the speakers has to be equal to the ohm load that the amplifier can handle. Those RF speakers are dual voice coil 4-ohm speakers. You won't understand this, so just take my word for it. Those wire down into either a 1 ohm load or a 4 ohm load. So you have to find an amplifier that is 1 ohm stable or 4 ohm stable.
One other piece of advice. Band names are not always the best in this business. Audiobahn is crap, I wouldn't buy anything from them unless it was one of their super high end amplifiers. They're pretty much all show no go, and I'll argue with anyone on that. JL is definitely good, but you're gonna spend an assload.
I have one 12" that'll outhit that pair of Rockford Fosgates and it's made by Crossfire. I've gotten my two new 12's that'll hang right there with JL, but they're made by Elemental Audio. Just because you've never heard of them, doesn't mean they're trash.