why did you quote the max ratings? we go by RMS

and we don't have a list of the power outputs of every amp, we just trust competitors for the most part. for the smaller shows they don't even worry about breaking down into power classes.
from the rule book:
"For local or smaller events, this division will be open without power class. For TKE and larger events (over 20 cars per division) the division will be segmented by the power class 1-600w and 601 w and up."
that goes for rookie up to ultra/ultimate. so basically look for 600 watts rms as rated by the manufacturer. once more amps are CEA2006 rated they might bring out a listing of amps, but unless it's challenged by another competitor, we don't look to far into it. course if you come out with two 40" long amps and tell me they are only 600 watts total, i might look into things

we were told to use our best judgement and common sense on it.
definitely try adding fill to the box. it might just add enough to give you that nice light subsonic rumble on track 5. i want to know exactly what freq that track plays, though, since i don't think it's below 20 hz, and i know none of the other tracks play anywhere near that low. so boosting around 20 hz for that track specifically won't effect any other portion of the SQ judging.
as for the HU, no we won't count it, as long as it's turned off. we only care about what you are running for the comp. judges are there to make judgement calls, and that's one of those things that would be totally retarded for a judge to count, and if one did, just go to the head judge and explain that the internal amp is off, and it's only for rear fill outside of competition.
suprisingly the rule book isn't super specific on a lot of things. just going over it during judges training i asked about 20 questions that i think should have been covered in the book. so if you ever have a question, post it in the iasca section on carsound, or ask me, i'll be more than happy to help where i can.
-brian