I would pick up the Crown if those are the only two choices. For one you most likely won't need to fan mod it since it is temperature controlled.
And the situations that require the fan coming on are when the subs are really playing loud so you won't hear the fan anyways.
BUT why not just get the Behringer iNuke 3000DSP? It will have all the equalization built into the DSP portion and by the user guide is 620 watts RMS / Channel at 4 ohms.