I am a Nikon shooter but just about any camera and lens will give you a good result. I believe that it is up to you and your eye whether you get some great photographs or just some snapshots.
Joke: why are some Canon lenses white? Answer: they are not ripe yet!
Not a joke: what is the best camera and lens to have? Answer: the one you have with you!
This being said: here is pretty much what I have and use:
Nikon D300 with MB D10 grip
Nikon 10.5mm f/2.8 G ED DX
Nikon 105mm f/2.8G AF-S VR IF-ED
Nikon 200mm f/4D AF ED
Nikon 500mm f/4 AF-S ED II
Tokina 12-24mm f/4 AT-X 124 AF Pro Dx—Hey, how did this non-Nikon get in the bag?
Nikon 18-200mm f/3.5-5.6G DX SWM ED IF
Nikon 24-70mm f/2.8 AF-S ED IF
Nikon 70-200mm f/2.8G AF-S VR ED
Nikon 200-400 f/4G AF-S
I use Nikon teleconverters and have a set of Kenko extension tubes.
Nikon flashes include the SB-900, SB-600 as well as the SU-800 and SB-R200 (two of them as I have the R1C1 system).
My assortment of filters include those made by Singh Ray, B&W, Hoya as well as some HiTech grads.
My tripods are both Gitzo’s (GT3540LS and GT3531S) and I use a Monostat RS16K ART monopod (great for when you cannot use a tripod due to a venue’s restrictions). Setting atop them are Markins’ ballheads (M20 and M10 respectively), a Wimberley Head (version II) or its stablemate, the Sidekick. The Monostat has Really Right Stuff’s (RRS) MH01-Pro on it. I have various RRS plates (as well as some of Kirk’s) as they make terrific, albeit pricey, products—I do not think you can go wrong with anything with their name on it. And something a “car door photographer” cannot be without: an Apex Bean Bag to support my camera and lens when shooting from the car.
Bags—any serious photographer has too many of these and I fit into this group as well. I have a lot of ThinkTank products with my favorite being the Airport International v2.0 as it holds a lot of gear and fits in most airlines’ overhead compartments. ThinkTank also has received some of my money for their belt and component systems but I seldom use them now. A backpack? Not for me as I have a bad back and found that any backpack made my back and neck both ache. I use a vest from Vested Interest as I have both the Still Vest and the Khumba. The vests are not cheap but are extremely well made and tough. I find a great advantage in wearing one of these vests is that I do not necessarily have to take them off when I get back into the car to go a short distance. Always putting on and taking off the belt/component system got to be too much of a pain. Speaking of pain: another plus is I feel the weight is better distributed with the vest. I have a Black Rapid strap but also find myself using the Cotton Carrier Lite system more and more. Again, better distribution of weight.
On the subject of weight: get a Walkstool: lightweight, easy to carry and great to sit on while waiting for that great sunrise, sunset or bird to get in just the right spot!