Stephen, regardless of which one you get, you will probably enjoy using it once you do. I bought a corded Makita a couple years ago. My pro-carpenter SIL was visiting before I bought it and noticed I didn't have one. Since he knew I had 18v Makita drill and driver, batteries and charger, he bought me the battery version for Christmas. I am not a battery tool fan as batteries die and are expensive but I do like that battery version of my Makita! Regardless, I have found some tasks that the trim router makes so much easier.
Ken
So much to learn, so little time.....