Columbus is a *really* fun race. Tons of crowd support, entertainment every couple of miles, big enough that you're always running with plenty of others, not so big that you're tripping over their feet.
They normally sell out, but not super early, so you've got some time to think about it, increase your mileage just in case and see how those longer slogs feel to you, just keep an eye on registration when it gets to be late July or so.
Only caveat is that the weather has been abso-frickin-lutely perfect the last three years. That doesn't happen in Ohio in October. So they're probably due for wet and miserable...