Hello all:

I am a novice photographer and I am totally stuck between these 2 cameras: theSony Alpha 7 and the Olympus OMD EM1. They both offer portability, decent sensor size, and excellent photographs, and that brings me to my dilemma:

1. My subjects often involve low light settings, no flash, night and day photography: musicians on stage in small clubs, urbex and rurex--abandoned buildings, "industrial" wreckage, New Orleans street scenes, etc.

2. Given my subjects, I am guessing I'll need 2 lenses: a standard wide angle and a short zoom.

I'm aware of the price difference for the camera bodies but aside from that, the only differences that seem relevant to my needs are:
* Olympus has image stabilization in the camera body
* Olympus has more lenses to choose from
* Sony has a bigger sensor
* for the Sony, I would have to buy lenses that have image stabilization in them

So for my purposes:
1. how important is it to have the image stabilization on the body of the camera?
2. How important is the difference in the sensor sizes of those 2 cameras for what I am doing?
3. Do I need lots and lots of lenses to choose from? (I've been told that I could buy adapters, but that they take away from the effectiveness of the lens)

Whew. There it is. My dilemma which on a big scale isn't all that important but right now is completely occupying my mind. Can you offer any advice?

Many many thanks