How to do this: Multiple pricing/permissions

I post galleries of photos taken at different events. I need to provide access so that a number of media outlets can download images for editorial/publicity purposes, and so that everyone else can view the pictures and buy prints. How do I do this? I want to limit the size that the public sees and have them watermarked, but the media needs unwatermarked images and may need print resolution.

I don't see any way to do this with coupons, as I can't restrict a coupon to just downloads.

Is there a way I can do this with Sharegroups, or do I just have to upload everything twice and run parallel galleries?