NextGen plugin – add on for views/loves?

I am wondering if there’s a plugin (or gallery) that will add a feature to “love”, maybe even “purchase prints” and count “views” for images? I would prefer to stay with NextGen but not sure how to search for this add on or if someone might know of an easy way to do this — here’s a sample of what I’d like to see:

http://www.samdolman.com/index.php/paintings/recent-work?sort_by=loves&page=1

Any ideas out there? This is a really cool feature for portfolio work.

Thanks!