based on the current DC rankings(which based on results I don't expect the top 8 to change at all, though I don't know the DC ranking system at all) I think Russia would be Canada's best draw by far. Then probably Germany. The other 6 teams would be really tough imo.
A match against Spain would be at Home
If we were to get Sweden or Austria(won't be possible in round 1 I don't think) it'd be away
Any other match would be random.
order of preference...
3. Czech Republic
I think, for the benefit of you Canadians, I'd put USA above Argentina and France on that preferred list.
France with Gasquet, Tsonga, Monfils is much more dangerous and Argentina with Delpo and Nalbandian is definitely more dangerous than the US. Plus, if Raonic is fit and plays, he's already gotten familiar with Fish and Roddick's game.