Whatever, success in this industry isnít dependant on camera choice, but rather itís about individualism, talent and determination.
I was going to write this long essay on why one camera is different than the other, ccd vs. cmos, lens choice, weight, tethering, whatever and it doesn't matter.
You should test whatever you want and use whatever you want.
Personally I like the cameras I use, probably because they're different, probably because I use everything I buy.
The project I'm on at the moment is a motion commercial of mixed stills and motion media and I'm using my panasonic GF 1 with a (gasp) kit lens.
Because I can in camera crop the still frames to 16x9, and go straight and seamlessly to motion. I have other reasons, but it doesn't matter.
Would I suggest this for you . . . nope . . . wouldn't actually suggest it for anyone, but I don't need the validation of anyone to tell me what's right or wrong and I'm not in the camera selling business and I definatley don't have a negative agenda to diss any brand, or to prove that my way is right. I'm also not trying to convert anyone to my way of thinking. That's high school crap.
I may be an insecure photographer, but not that insecure.
The only real advice I can give is don't get caught up in the electronic buy it now BS. Or for that matter the more megapixels only matter, or the live view is the only way or whatever else someone feels they can't do without.
Great photographers have used all kinds of equipment to make great photographs and the best I know do not follow the herd.
I do know for me, I like medium format cameras and have used my old phase backs for a long, long time and will continue to.
I also know the next camera I buy will be medium format and will probably be the Hasselblad H5. I haven't had time to test and decide and I could list all the reasons why the H5 is on my list, but it would raise too much of a shit storm with the Nikon evangelists that have turned this forum into a d800 sales tool.
Buy what you want and make beautiful photographs and I wish you the very best of luck.