Sitting comfortably? I think a Canon 1D mk3 is the "best" camera for wildlife....a couple of grand for one of those. A long lens for birds and other big wildlife...about five grand each for the (really) good Canon ones! You could spend another grand on a lens for landscapes and again on a macro lens for insects.

Silly money!

Do you have a budget in mind? There are far more affordable options than the top quality stuff mentioned above.