Another vote for the Fuji X system.
I came into the X system via the X-Pro1 + 18mm + a choice of free lenses offer a while back. I had a Nikon D800 that I had taken fewer than 500 shots with in a year of ownership and after a quick play with the X-Pro and a look at some resulting shots, I traded the D800 in against the small system and a pair of zooms (18-55 and 55-200). Not long afterwards, the X-T1 was announced and after a play with that, I bought the one they had in stock (leaving the next person through the door the slightly shop soiled one - 3 shots by me and a few by the buyer). I traded the free lens from the original deal in against the X-T1 since I have a true macro lens (I went for the 60mm macro as the free one) for the Nikon system I still have. I have also added the 10-24 to the zoom armoury and am waiting for the soon to be released 18-135 which is weather sealed to match the X-T1 and offers a little extra range - useful in these days of restrictive weight allowances on flights!
I still have a toe in the DSLR field, using a D700 and a D70. I also have a couple of 1 series bodies, an AW (waterproof so ideal for snorkelling) and a V1 which I use with the adaptor and my F mount lenses, mainly for the extra apparent reach the 2.7 x crop factor gives. Have to say that the Fujis knock spots off the 1 series in terms of image quality.