I also think that Boonen and Canc will make this a good race. I'm not sure if it's possible that they'll mark each other, if they're both the strongest and they get away, they're the kind of riders that will work to stay away (ala 2010). I could see Chavanel attacking and no team chasing (would be familiar Devolder scenario), but if the race plays out as a war of the strongest and Fabian/Boonen are in an attacking mood, how can anyone see past them.
One thing I wonder is about Vanmarcke. He's been strong, for sure, but I'm wondering if he's targeting Roubaix more since Haussler is in love with the Ronde. And Haussler's said he feels good, so I really don't know what was up with him in E3 - yeah he hasn't featured in the finale of races, but maybe he's not total crap?
Anyway-
1/2 Canc/Boonen
3-6 Breschel, Sagan, Chavanel, Pozzato
7-10 Haussler or Sep, Leukmans, Eddy Boss (yeah, finally), Ballan