I prefer the Canon 5D Mark II coupled with the 70-200mm f/2.8 (with image stabilization) and a 24-70mm f/2.8 for wide angle shots although the 18-35mm wide angle is better if you need the look of a wide angle shot or more of your scene in the shot - like very large crowds. Rent them before buying to see what suits your new "signature style".

The long lens gives me more range and a wonderfully shallow depth of field. The extra stop(s) of light with the f/2.8 allows me to get wonderful shots inside and out without always having to resort to flash fills.

For candid shots I prefer the 50mm f/1.4. It's sharp and fast focus, ability to shoot in very low light (especially with the 5DmkII) and incredibly shallow DOF potential is always a crowd pleaser. While everyone expects for a flash to be firing when a photographer is present, the ability to virtually disappear into the crowd and only the faint sound of a shutter (which can also be set to quiet mode on the 5DmkII) allows me to get the best shots in natural light. After all, that's how they are seeing it while they're there. :)

That camera can also shoot 1080p HD video at 30fps through any of those wonderful lenses. If you shoot video, I highly recommend a steady-cam mount.

If you're on a budget (from buying all the glass), go with the Canon 7D (new). It's features out perform the 5D in many ways but you will have to deal with a medium sized sensor (cropped).

Set up and capture the right image the right way in-camera. Post work is so noticeable and definitely a sign of an amateur (in my opinion) and often overdone. But to each their own. Let the 50mm f/1.4 give you the soft edges, don't add them later. But you weren't asking for tips on technique, only the equipment. :)

Best of luck with your new focus!

Nikon D3
Plain and simple.
So amazing.
I love it.