I jumped on a 6d on here myself and couldn't be happier. Well... I'd probably be happier with the 5dmkiii but I'd still rather have the 1k in my pocket which I spent on lee filters, lighting, umbrellas, backdrop, and my 17-40. I think it was a good choice...
Drawbacks, I miss the AF of my old 7d. Besides that and the 1/8000 shutter, and the joystick. The lowlight and full frame goodness on my wide open shots are by far making up for any shortcomings. Worth the money in my opinion.
Canon 6D | Canon 17-40L | 70-200L IS II | Sigma 35mm f/1.4 | Canon 100L | Canon Speedlite 600EX-RT | xplor 600 | flashpoint 360 | alien bee B800