It doesn't matter what you buy, whatever feels comfortable in your hands, you can't go wrong with any digital SLRs these days
When I was scuba diving in Honduras, I met a National Geographic photographer, he uses Nikon, went on a photoshoot with his friend (uses Canon) in the Desert, Canon was grinding after the assignment, super fine sand/dust was getting into the body and lenses. He told me that Nikon has a far superior sealing system in their cameras and lenses.
Here's a good read
http://www.kenrockwell.com/tech/nikon-vs-canon.htm
First DSLR for me was a Nikon D70, sold the D70 to a friend, then purchased 2 D200's
Personally I use Nikon, have 15 lenses, primes and the preminum zooms.
Have 2 Nikon D200's, cannot switch because I have 2 underwater camera housings for the D200's
All lenses have a Heliopan SH-PMC UV filters on them.
Purchased a D300, then sold it to a friend when the D700 came out, just picked up my D800 last week, just found out Sea&Sea is making a housing for a D800, so I'm tempted to buy it.
http://www.bluewaterphotostore.com/sea-and-sea-mdx-d800
It would save me a lot of weight travelling, won't have to bring my Sony HDV camcorder and housing.
Wrong timing
, they won't before I go scuba diving and the end of July to Galapagos Islands (it's whale shark season), then to Machu Pichau
Probably buy the D800 housing for my next trip, muck diving in Indonesia in Aug 2013
I'm a old school photographer, still own a Leica M4P and a couple of Hasselblads, and 2 Nikon F100's and F70. Haven't shoot film in years.