It is excellent to start with, if you do want to flatten it. I don't recall the last time I saw someone posted a nice curve like yours in their first attempt.
It is excellent because as you said, it was a hump, that Audyssey can fix very effectively.
No the hump is from about 22 to 32 Hz, I wouldn't touch anything pass 35 Hz.
It is not a bad thing to have that range somewhat elevated anyway, as long as it is not excessively elevated, even elevated by 5 dB is not an issue because a) there is much content in music that goes that low, b) humans are not too sensitive in such deep base, you can almost feel it more so that hearing it, and c) there are lots of contents in movies that go that low, but for movies, it could be nice to feel the impact as well as hearing such deep bass anyway, but again you can go by ears. If they complain then do something, otherwise just enjoy it.
The suggested cuts in my earlier post were intended to smooth the curve, not so much as to remove the "hump". That is because studies found it sounds better to people if the response is smooth. In your case, I would bet smooth or not, you probably cannot tell a difference, because of reasons I mentioned before. That's why as I said, I only mentioned it because in an earlier post you said you could be "anal".
PS: Still would like to see you post an Audyssey on vs Audyssey off curve. If you do that, please show both on the same graph so it cannot compared easily.
