Great capture... Lots of cloud-to-cloud action there.
I used to shoot a lot of lightning, especially in Film. But with Digital, if you captured it in Raw, you might try playing with the color temperature / White balance. I'm noy saying that yours needs color correction, but many times the clouds are illuminated by the lights of the city and take on the color of the lights or some other unusual colors. In some cases a Tungsten WB works really well for truing-up the colors (or sometimes a dual layer hybrid).
This is true also for DSLR star shots, in areas with some light pollution.
Thanks all for the wonderful comments. It was a pretty incredible light show. To view it on a beautiful night with some good friends and a couple beers, no it doesn't get any better than that.
FWIW, I like the first version better. The lights man made lights show the contrast between the power in the sky and puny mankind and his civilization, and they help contrast the power and light of nature, and set the scale of all of those parameters.
