the Osmon system. After consulting with a panel of experts, we have also determined which station we will be basing out of: the IV-5 Science & Trade Institute School. It came down to a combination of services, undock radius, and proximity to two of the ice fields (thereby making it more likely that undocking with aggression will pull Concord out of an ice field).
If you're planning to create insta undocks or a station inta, that's the one to use. If you're moving ships or supplies, or seeding a market or corp contract, send them to that station. If you already have a ton of stuff in a different station (as I did), the courier services I mentioned should offer a pretty good deal on a 0 jump courier contract. Just make sure to hit the "search" button when you enter Osmon into the destination field, and then select the Science & Trade station from the pop-up list.