I think this is an interesting question that should be asked.
Case for preferring Atlanta:
1) Overall, Washington is the better and more skilled team. I think they have considerable more talent than Atlanta, and Washington would have the best player in the series in Wall, though it's close.
2) Washington has played us tough this year with a personal vendetta against us after getting swept by us last year, I would expect much of the same in the playoffs with things getting really chippy.
3) Washington is a monster at home, and it'd be hard to win there. On the other hand, we've beaten Atlanta at Atlanta already this year.
Case for preferring Washington:
1) Though a better overall team than Atlanta, we matchup much better with Washington than Atlanta, who has exposed us at times this year. Atlanta has similar advantages over us as Chicago.
2) We have a much better record vs Washington (6-2) than Atlanta (4-9) in the past two years.
3) Washington is not the same team on the road as they are at home, so HCA could suffice. Atlanta has actually beaten us in Boston already this year.
So what do you think? Which team would you rather face in round two, should we advance?