I'm on AT&T, but not upgrade-eligible for another 10 months. I've been planning to get myself a 6+ for Christmas, and wondering if I should give in to the Next program, or buy an unlocked iP6+. I'm still on the original unlimited data plan, and not particularly interested in changing plans (or carriers). It seems the unlocked version would be a better value for me, even if I stay on AT&T. Thoughts?