David Pinto at baseballmusings.com provides his NL Central Preview and predictions. This is a fairly objective view of the division, and I think his conclusions look about right.
He relies upon WAR from fangraphs for his preview. His order of finish with his prediction for each team's liklihood of winning the division:
- Cubs, 55%
- Cardinals, 15%
- Astros, 12%
- Brewers, 10%
- Reds, 7%
- Pirates, 1%