Honestly, you might want to take an interesting gamble, and go with Lance Moore. Yes Atlanta is pretty solid against the pass here, but we're talking about the #2 WR to arguably one of the best QBs ever. Drew Brees has 51 consecutive games with touchdown passes, a number that doesn't look to let up any time soon. Also, last week Moore was only targeted twice, but both came up long, and he got 60 yards. He's a very explosive player who often gets a lot of yards. His upside is huge.
But if you insist on either Kenny Britt or Ben Jarvus Green-Ellis, I'd say BJGE. Like I said, I don't think either one is stellar, but Giants run defense has been weak lately.