After using Nikon (D300/D700) and Sony (NEX-7/A7r) now I use only Olympus. Two body OM-D E-M5, one OM-D E-M5 with 25mm F1.8 and another OM-D E-M5 with 75mm F1.8. No regrets for the past,for me small is beautiful. Image quality of the Olympus with its lens is sharp, beautiful with gorgeous color.
Light - Small - Fast - Sharp - Lens Hood
After using Nikon (D300/D700) and Sony (NEX-7/A7r) now I use only Olympus