Wonderful pic Mike.
It compares well with this APOD from Gendler:
http://apod.nasa.gov/apod/ap090919.html
http://www.robgendlerastropics.com/NGC3621.html
& even ESO with their 2.2m telescope!
http://www.eso.org/public/news/eso1104/
You have proven that amateurs are catching up with professionals.
well done
cheers
Allan