I am using a Parasound 3500 to drive my 3.6's now.
I used a 2200 in the past and have tried a variety of amplifiers to make them get up and go.
The 3500 is so far the best by a wide margin unless you spend a lot more money.
I have the system right now where the Amplifier seems the clear weakest link but I also have nothing bad I can say about the 3500.
If you can find one,it will make you happy,it has me!