That's an amazing image, Michael. Love it!
I've used the new (although not the new $7K version just announced) 50 Cron, and it's a great lens. It has a built in, extendable, hood, which is nice. Takes 46mm filters (if memory serves), and renders beautifully. However, I've had this 50 Cron for years, and there is something special about it. It's rock solid, tack sharp, and the bokeh is beautiful. Plus, a good used one can be had for a reasonable price. I saw one about a year ago for $500. My version takes 39mm filters, and it is a twist, rather than tabbed, focus ring. I actually prefer tabbed, but I love this lens so much I've never been willing to replace it.