The best is the the one you have.
While some rumors talk about a mysterious Canon 3D, I was attracted by an article of Amateurphotographer. It is reported that, in Afghanistan, war photographers use i-Phone more often than cameras.
Not only in Afghanistan, but all over in the world, the best camera is the one you have with you, therefore, almost always the prime camera is the mobile phone.
Interesting to see that most of the photos on Flickr are from mobile phones.
As reported on Geek: the leader is i-Phone, followed by Nikon D90, third Canon 5D MII, fourth Canon EOS 450D/R XSi and fifth Canon EOS 500D/RT1i.
Everyone, even the most experienced photographers take photos with their phone, it’s more practical, and always at hand.
That’s why also the most professional market is so interested in finding solutions increasingly small and compact.
Click those direct links to check the 5D MII price: Amazon, B&H, Adorama, Canon USA, Digitalrev, eBay
EOS 450D/R XSi: Amazon, B&H, Adorama, Canon USA, Digitalrev, eBay
Canon EOS 500D/RT1i: Amazon, B&H, Adorama, Canon USA, Digitalrev, eBay
Nikon D90: Amazon, B&H, Adorama, Canon USA, Digitalrev, eBay