If you are not taking a lot of action shots, try and find an X-E1 at a much lower price. As for the lens, yes, they are expensive, but not more than Nikkor lenses. The 16-50 has a better range then the kit lens 18-55, but it is much bigger and heavier. The 18-55 is called a kit lens, but it is not, it is an excellent zoom. I just bought the Samyang 12mm f/2 so I can go ultra wide. I also got the 35 mm f/1.4. You may consider the 23mm f/1.4 but again it is much bigger, heavier and more expensive. I have these three lenses in Billingham digital bag, If I need long tele, I carry my 55-200 in a waist pouch. I wish I bought a larger bag such as the Billingham small so I can carry a bottle of water.
I am not too familiar with the X-M1. You can read the reviews at dpreview.com. I am not sure if has an EVF which is a must for me. And the EVF is the reason I bought X-E1 instead of the Panasonic or Olympus 4/3 cameras . I also like the range style without the hump at the middle. Now Panasonic has caught up, and the GX7 is an excellent camera with very nice lens choices. My daughter has one and she loves it. Its price has come down quite a bit recently.