Most of your route is rural of course but you will be spending time in congested areas with some heavy traffic during commute times of day. Lots of lights are a good thing.
For years I've used the drop down handlebar mirror mentioned. It eventually becomes part of your scan and gives you good situational awareness but not much for detail. You can't really spend time staring at it because you must take your eyes off the road. Only a quick glance. It's an I--see-something-big-coming-but-can't-identify-it-exactly sort of thing. Also, if you sweat a lot, as I do, it will require a regular wipe-down. And like any mirror is only effective if you're looking at it.