Olympus E-3, primarily because of the great weathersealing & the fantastic lenses.
I used to have quite a few lenses, but have worked my way down to only 2: Zuiko 12-60 (24-120 in 35mm speak) and a Zuiko 50-200 (100-400).
Currently contemplating adding a Canon 7D, but will wait to see if they get some of the issues resolved first. I'm also keeping my eyes open for the Samsung NX10, which is a mini DSLR using an APS-C sensor, fully weatherproof...but it's a Samsung.
The only "cool" accessory for me would be a couple of these: http://www.bhphotovideo.com/c/product/3 ... Gray_.html
Absolutely bulletproof & I never leave home without them. I've had them completely submerged & they have worked like a charm.