No, the cut off is 100 Hz because the graph started dipping from 100 Hz UP not DOWN..Sorry, but I don't see the null you are talking about between 70 - 100 Hz.If he can move the sub so that the graph is better from 100 Hz UP, that will sound a lot better.
Set the movie/music sub to 0.You will definitely feel the difference after changing those 2 steps I posted. I was in the same boat as you are, I felt my sub was anemic although my sub graph was really good. I boosted it up and sounds a lot better now, although most people here will tell you to give time for your ears to adjust. Your ears will not adjust to the sound, trust me.Sub is SVS SB1000. Pretty darn good for SVS' entry level sub.
It depends if you want bright or warm sounding speakers. Personally, I prefer warm sounding speakers specially if it will be used mainly for music. it will be very relaxing even for long period of listening.
It also depends on the kind of music you are listening to. If you don't need bass thumping speakers, why don't you try Maggies as well. It might not look good in your living room tho.
I have a B&W CM9/ Anthem MRX700 combo so I can tell you the CM10 won't...
Although I got an SPL meter, I didn't measure it at the old place. But I have DVD's that I really know well and use it to test the system, my volume was set to -30 at the old house. Using that same movie, I can only go -35 and my wife starts yelling at me for being too loud and feel the same way too.Yes, I use ARC before and re-calibrated it again after moving.