Loud as hell all the time???? Are you forgetting that any deck AND amp made in the last 10 years will have equalizer settings, and amp gain settings? That's 4 different means of fine tuning the output.
Either one will be enough for what you want. But for only $15 more the VR blows away the other one. (in more ways than the rms rating) You'd be stupid not to get the VR. Not to mention it is spec'd for a slightly smaller box.