It makes a HUGE difference. I doubt that would be too much power for your speakers, but you don't have to get that one... if you look, they have some lower-powered 4 channels as well. Honestly, without a subwoofer to keep up with, I believe about 50-60 watts x4 rms would be more than enough. However, with the larger amp, you'd have the room to up the power when you begin to feel that it's too quiet.