Personally I'm curious whereabouts the bass quantity ends up at, in my personal experiment from testing various bass boosted headphones including from a bit smaller boosted to the biggest boosted bass quantities available (we're talking about 3 ~ 15dB range) I really think 8~9dB is roughly the ideal amount in terms of bass quantity vs quality in the whole range. I've never heard a a headphone with 10dB+ boost that doesn't come with a noticable midrange impact. M-Audio Q40 are quite spot on, aprox 8~9dB boost and manages to somehow to be quite free from midrange bass bloat. You should pick up one for "scientific research" to get a good idea whereabouts is the max possible bass quantity before it starts impacting on midrange/highs noticably and M-Audio Q40 is right there on the border of becoming intrusive on the whole range but also manages to have some very impressive bass extension and impact.
Ultrasone PR900 also comes with pretty similar amount of bass, about 9dB (peak) boost which is also known for it's impressive bass impact vs no midrange bass bleed but this headphone is heavily V-shape signature which isn't my cup of tea, Q40 on the other hand is very balanced in the mids & highs except for the noticable bass boost.
I'm personally hoping M100 would end up having a bass boost peak of around 8~9dB, I'm a basshead but I don't like to trade especially midrange detail for pure bass quantity. For me the FR response graph of the M100 is what I'm looking most forward to when more info gets released.