Why cut it at all? Based on your particular sub, that's an area I'd want to optimize. You really don't need your house curve that aggressive either. A 3 db rolloff is essentially halving your output. I'd personally see how the 28hz curve looks with 0 cuts, and start the house curve roll off from there.
Our hearing is more acute to higher frequencies than lower ones. An 80hz tone will sound louder than a 20 hz one. The whole point of a house curve is to equalize these differences, so they sound similar in output. A house curve is purely subjective, and will vary from one listener to the next.
I prefer a house curve for HT use, but a ruler flat curve for music. That's another thing that makes the SMS handy; the fact I can switch between eq options on the fly, not to mention volume.
Psychotic Episode Averted