I played with the V1 and was very close to getting it. the focus system is incredible and fast and I thought the idea of using my already purchased Nikon glass was a plus.
Why I went with the Oly was: 1. I come from back in the film days of the 70's. The Oly to me was very retro looking (of which the OM-D will be even more so) and i immediately liked the look. 2. the Oly felt better in my hands. 3. the touch screen focusing is very fast, in fact, I rather enjoy this rather than having to move the focus points like we do with our SLR's. 4. I purchased the external viewfinder, called a VF-2. resolution is very good. 5. Oly had a wider range and had just come out with some very fast primes like the 12 2.0 and 45 1.8 that were getting great reviews.Adapters are everywhere to use Nikon or other manufacture's glass. 6. Overall package to me just felt better, kind of like buying a car. I like the looks of that one and knew i would carry it with me more than the V1.