The one that makes you happy.
Go get a cheap turkey or two and do a test. I like 256 to 274.
I cooked two turkeys the other day at 256, because I had 11 racks of ribs on at the same time and did not want to bump the temps to 274. They turned out good, really flavorful. I cooked a Jenny-o and Butterball, just rub and in the FEC they went. I hate to say it, but the butterball was really good. I did not have to brine, as it was enhanced and it was easy. The total cost of this test, 15 bucks for the turkey's and time.
Do a test run.