I would suggest starting by breaking down what you need/want your LMS to do. The reason for the massive increase in LMS software over the years is the increased market for diverse organization-specific needs, and the fact that there is simply no one-size-fits-all solution for everyone.
You mentioned making it easier to track test scores and course completion. That’s a start, and 95% of LMS software out there is more than capable of that. Do you need it to do anything else? SCORM importing is obviously important. What about Google Apps Integration? Do you want Developer API access to customize it yourself? LTI Support? Native Web Hosting?
Knowing these will give you a great launching off point where you can narrow down your search significantly.
Blackboard, for instance, does all of this save for native web hosting. Instructure Canvas also does that, plus allows for native web hosting, and allows for bundled course content. Absorb is probably the easiest and most straight-forward, it’s basically plug-and-play, and if your office is small to mid-sized it might be perfect for you.
If you’re in an industry like me where there are highly stringent regulations regarding record-keeping and auditable trails, you might need something like Syberworks or Noverant, for example.
And if at the end of the day all you really need is a way to track course completion and test scores, you can save a lot of money by simply maintaining a basic SQL database that Lectora exports completion data and test scores to. No email notifications required!