Photography themes and plugins

[Alchemy]

I'm doing a site for a wedding photographer. They want to be able to have password or membership protected files so that each client can access their own photos but they won't be public:
Down the track they may want to sell photos from the site but that's optional
They are planning to upload watermarked photos but I thought a decent solution should watermark them and allow (optionally paid) downloads.
I thought there might be a premium gallery plugin to acheive these goals.
Any suggestions of plugins to acheive this.
I haven't noticed this funcitonality in genesis themes.
I've thought of using photoshelter and integrating it with wordpress, but I'd prefer a totally wordpress/genesis based solution.

Thanks