Bernies's Crew, one of our favorite Brewers blogs, posted their 2011 Astros preview, and it's in-depth, and well worth a read.
Here's your closing shot:
I'll say this: their offense features four wild cards in Carlos Lee, Bill Hall, Clint Barmes, and Brett Wallace. Their pitching staff does not look strong on paper, but could surprise some people during the actual games; how does a 30-50 run improvement on offense and 20 run improvement on pitching/defense sound? We'll say the club looks like a 651 RS / 709 RA team -- better than 2010, but they'll have to rely on their efficiency once again to surprise their opponents.