I like it Bob. Perhaps giving it a tiny bit more contrast might be an option. One way to add a little jump to it would be a duplicate layer, Soft Light blending mode and perhaps 50% opacity:
HA! AuntiePode, that's been my contrast tool of choice since I ran across it a while back, but I usually end up around 30% opacity. I never would have thought to use it on this image.
I like the conversion, but agree some clouds or.... something.... would help the sky.