Forget all the high tech guff for a minute...go out and buy a 100D/SL1 slap on a shorty forty, walk down the city street and shoot, shoot, shoot. Go on you know you want too....it's called fellin gooooood! Don't be shy post them here.
Is this combination good for BIF (birds in flight) or macro or landscape. Street photographer is a narrow field
Might I suggest you buy a 1Dx, 600mm II, Wimberley head, TV 2x, ... and shoot birds
Great point that the OP's version of "happy" is a narrow focus.
Although to be fair, the original idea is a bit more budget friendly than what you suggest. I'd love to take the advice though.
I'll stick with option C for right now, which is trying to get the most out of the gear I've got while saving up for a new rig.