I reckon discard USA, especially at +600, with the bigger ice and the short price I wouldn't go near them.
Don't think the field has a chance either so would probably stay away from that.
CZ republic I would discard, although they have some great forwards and a decent goalie in Pavelec, don't think they have the defense quality to win it.
Russia at +225 is a no go - Price is way too short and although Malkin, Ove and Datsyuk is not exactly a bad line, defense needs a bit of work and pressure of a home games is mad!
Which leaves Canada/Finland and Sweden.
If the Olympics were in Canada I Think they don't lose a game and take it easily, they have the best squad by far but ice factor may be an issue.
Sweden/Finland I think you just choose one here as there a similar style team, although I think the price for Finland is awesome, in my opinion Sweden have the edge.
Sweden has a great team, and Finland could win alone on goaltending with Rask, so +1200 is a nice value. Plus, you can almost pencil them in to at least get our of their respective groups.