Hard to say with UNC. While I'm not sure #6 is realistic, I don't think it's completely unrealistic. They do return much of last year's team, including Berry, Jackson, Meeks, Heeks, and Pinson. Not overwhelming, but certainly a lot of experienced talent that has played a lot of basketball together. The real interesting question for UNC will be can any of the aforementioned players replace the individual playmaking of Paige and Johnson -- the two guys who tended to carry them this year when things got bogged down. Not sure they really have anyone who can go out and consistently make a play in tough moments. With that said, I don't think they're about to fall of the map either. They should be pretty good.
As for the ACC at large, I think Louisville, UVA, and Syracuse should all be in a 2nd tier with UNC.
As long as we avoid a totally disastrous offseason (e.g., a combination of Grayson declaring, Giles not healing well, Bolden signing with UK), I think we should be heads and shoulders above everyone in the league and hopefully well-positioned to secure our first regular season title in a surprisingly long time.