I've always used between 100 and 250 watts of ss power with my 2ce Sigs & 3A Sigs. Other than the sound of the amps, I didn't notice any difference in "headroom".
If you go with the Quatro, I would imagine you wouldn't need quite as much power, since they have their own powered subs.
If you go with the Quatro, I would imagine you wouldn't need quite as much power, since they have their own powered subs.