I'll be in Vancouver later this week to cover the tie.
Actually think Guillermo Garcia-Lopez will be the second singles player after Granollers. Ramos is not very good on hardcourt, nevermind a fast indoor court. Garcia-Lopez has beaten both Nadal and Murray on hard, and play the kind of flat game that can give the Canadians trouble
Agreed with CDNguy87 regarding Pospisil. Actually just wrote the Team Canada preview saying essentially the same thing. You never know with something like Mono, so we'll see how much Vasek is actually going to play.
As for the doubles, the Spanish team matches up well against Nestor, especially in best-of-five (2-0 last year, both on hard courts). I'd say the Canadians are slight underdogs there actually.