...general consensis regarding the amount of outbound links...
Just go out and look at other sites. Most of them do not link out freely. They worry about giving away linkjuice, they worry about helping competitors, they worry about losing traffic, they worry about damaging their income.
if there is a correlation between the more you have going out, the more damage you can do to your domain.
If there was a problem with linking out then wikipedia would not rank for anything.
The web is all about linking and I highly doubt that google would penalize sites for doing it. In fact, which would you rank higher... a kickass article with no external links or the identical kickass article that links out to all of the most important information on the web about related topics? Which would you value if you were a searcher?
Link out freely and links will flow back to you.
is a site with good domain authority better to keep the short leash on handing out links to external sites?
You don't need to keep a leash on the links what you need to watch out for is linking to trash. I you are linking only to site that are better than your own then I am betting that you will be rewarded with links, likes, domain queries, rankings and more.