Following playhard's logic, I'd say go straight to Hasselblad and never look back!
I'd agree. There are many advantages that a D3100 has over a D7000 or D800 when it comes to beginners. Fewer confusing buttons, more "help modes", lighter weight, lower body costs giving the hobbyist more spare funds for lens upgrades in the future (of course I'm talking about mortals like myself,
not celestial elites who earn millions a year - in which case just buy an M9+noctilux AND a Hasselblad+full suite of lenses), etc.
As much as many would disagree with me and groan when I say this, I still firmly believe it's the biggest variable is the photographer, followed by the lenses, and then the body.