Good amp to run with infinity perfect component set

Ok I am planning on getting Infinity KAPPA PERFECT 6.1 6 1/2" Component for my speakers. I am going to need an amp to run i am wondering what are some good amps that will run about 4 ohms at 100 rms x 2. Also i have some pioneer 4 ways 50 rms for my rear speakers that i will eventually change out later should i run a 4 channel amp any suggestions would be greatly appreciated.