That makes Dragon look even more like Soyuz--its where that spherical living compartment usually is (except for the Zond circumlunar versions)
If anything, the Mars fly-by dragon looks a bit like the Soyuz 7K-LOK http://www.astronautix.com/craft/soy7klok.htm
The inflatable nose might just be a good idea. There is supposed to be a massive 50 km comet that looks to either hit or just miss Mars in 2014: http://up-ship.com/blog/?p=19134
So that mini-transhab might just see some use as a meteor bumper.
I don't like the idea of a married couple, in case one gets sick, it is a live tragedy (light delay aside).
I would volunteer for a flyby mission. I have no dependents, so if I croak, it's no big deal. More resources for one--no fights, and I live alone anyway. Moreover, even if I did break down, I would ask mission control not to report it, so as to not cast doubt on manned spaceflight, and suffer in silence if worse comes to worst. Once I pass the point of no return, and there is a leak, I might hope to set the capsule down on the surface as has been contemplated, so I might die on the surface after gathering some rocks. If I crash because the Dragon wasn't prepped to land on Mars, that's fine. If I continue to loop through space, that's fine.
But you don't want a Harlequin romance
turning to divorce or a worse tragedy.
We already saw Baumgartner put spaceflight down after his balloon jump.
That I would never do, even if I knew I wouldn't be coming home.
Stoicism and fatalism are required for such a stunt.