Nice choice in subs. Not many people go for Infinity Subs, but they are good. I just installed Kappa Perfects all the way around in my cab. Sounds amazing. Anyway, each sub will push 350watts RMS (1400watts max), even push it to about 400watts RMS (good audio companies have a habit of listing the RMS a little lower than what they can actually handle).
I have two Alpine Type R 12s being run by one of the last true beasts of amplifiers the Alpine MRV-1507 V12. This pushes about 400 watts to each one of my subs and they say they only handle 300 RMS (1000watts max). I have had this setup twice in my life now (once in an Integra before it got stolen). I will list what I think are really good amps, not really cheaper stuff you can get at Best Buy or something like that.
But here's a list of possible Amps.
Alpine MRV-1507 (discontinued, but can be found on Ebay all the time)
phoenix gold TI600.2
this all depends on how you want to wire your subs or if they are Dual Voice Coil or not. If they are single, you need a 2 or 4 channel amp. If they are DVC, you can run them with a Class D Mono amp. It all depends. Just think- you have about 700 to 800 watts of power that you absolutely need. You don't want to under power subs cause that causes clipping and will fry the voice coils in the long run. Rule of thumb: more power is actually better. You just gotta look around, but if you want to spend the $300-400 look for the Alpine or the Phoenix Gold amps I suggested. Hope this helped and good luck with your banger.
5 Speed Manual
Alpine CDA-7895 Head Unit
12" Alpine Type-R, sealed box
Pioneer 400w amp for $20 at a yard sale (to replace my fried MRV-1507)
Infinity Kappa 4" 2-way speakers(rear)
Infinity Kappa 5.25" component speakers(front)
Debaffled airbox, K&N filter
Tracked Mud on carpets
Shampooed and cleaned carpets