I don't get the draw about mirrorless, is it all just the size and weight?
Cant speak for others, but the main advantages for me with mirrorless are:
- Much more simple, robust, silent and cheaper cameras thanks to no mirrorbox, especially including the possibility of having even larger sensors than 36x24mm without getting too bulky for my needs (like a Sony 44x33mm sensor)
- Autofocus over larger parts of the frame, precise autofocus thanks to contrast analyzation (in panasonics system or in combined contrast/phase autofocus)
- Higher quality, smaller, more lightweight, cheaper wide angle lenses thanks to shorter flange distance and much less need for the useage of retrofocus constructions
- EVF and its possibilities for precise picture quality control (focusing aids like magnification / focus peaking / digital split screen, exposure aids like zebras / life histogram / false color zones, life review of white balance, etc)
My favorite pick as producer for such a system would actually be Leica:
- With the Leica M system, they have good experience in creating digital sensors that can handle steep angles of light (from wide angle lenses).
- With Panasonic as the partner, they have access to Panasonics advanced contrast autofocus technology.
- Unlike Zeiss and Sony they dont tend to make lenses with a ***load of glas in it.
Sadly they also have the disadvantage of high prices, though I have to say the price for the Q and SL are pretty OK.
Fuji is working on such a system, according to rumors - so thats what I'm currently waiting for.
Nikon would be cheaper, have better colors, will be integrated into the Nikon flash system and probably offer better autofocus for sports - since thats definitely one of the strong suits of the Nikon 1 system. However in my understanding the Nikon 1 cant handle low light well.