This is Arturo Galletti's breakdown of the 2013 offseason and the subsequent season. Obviously, this is clearly a numbers and analytics based projection, but these guys have been close to money in their projections in the past. For reference, here are Last Year's Projections from the same source.
Looking at last year's projections and the actual win total:
Miami Heat 55.41 projection, 66 actual wins
New York Knicks 55.27 projection, 54 actual wins
Atlanta Hawks 47.66 projection, 44 actual wins
Chicago Bulls 44.26 projection, 45 actual wins
Needless to say, with the exception of the Heat, their analytical projections come very close to the actual win total.
With that said, here is the graph from the article that shows the 2013-14 win projections for each team:
I'm looking at the nominal win column. The Hawks as they are right now are projected to win 48.2 games on the season. Of course, they give a range. On the low end, the projection for the Hawks is 38 wins. On the high end, it is 50 wins, essentially. I've felt that 45-47 wins was clearly possible by looking at the WS48 of each player currently on the team.