Hello Galo,
I always tell folks to buy as much power as they can afford, so you needn't ever worry about pushing your amp into incipient clipping, or higher distortion levels that occur as an amplifier approaches its output limits.
I don't know the size of your room, what sort of levels you like and all the other variables that intersect when you talk of power demands and Sound Pressure Levels in a room, but another approach would be to add a subwoofer. That way, you'll get dedicated low-frequency oomph and an extra 175 or 200 watts for deep bass, which is where most of the amplifier power is used. Then your Pioneer can easily handle any upper bass, midrange and high-frequency power output demands, which, compared to low bass, are fairly modest.
Regards,
