Duckworth is at least a strong fundraiser and potentially a very telegenic spokeswoman, and I don't understand why Benishek is on this list at all.
I could be wrong but I'm under the impression that she's a Darcy Burner of sorts who just speaks in platitudes and is very much an outsider in her district (ie someone who relies on a lot of out of state money). The fact that she beat a one term incumbent by ten points may sound impressive, but when you compare to Bill Foster who unseated a more tenured stronger incumbent by 15 points, I'm not sold yet on Duckworth.
Duckworth was originally recruited by Rahm to run in 2006 for the seat vacated by Henry Hyde. She didn't live in the district, and beat a genuine homegrown Dem in the primary. She narrowly lost to Roskam despite a huge amount of money poured into the campaign.
She was given a number of high profile posts after that to keep her viable. Like 2006 her 2012 campaign featured lots of photo ops in district, but not much about the specific issues of the district. She strikes me as the sort of candidate who would fit well in a safe parliamentary seat reserved for second-tier ministers.