In reply to Davey_HB:
I haven't climbed in Canada, but I used to climb ice all winter, every weekend, for over a decade when living in Finland. For years and years I thought you MUST have monopoints and there was no way classic crampons could ever work. Then I broke my terminators, and while DMM were very kindly sending me replacements, needed to use my G12s. What I found is they worked absolutely fine, even on cold ice (which I would call -15 to -20 sort of temperatures. When I bought warmer boots, I would normally just chuck in my G12s as it was too much hassle to change the size of the terminators. If you look at the pics in this review
http://www.ukclimbing.com/gear/review.php?id=6103 you can see the G12s in use on what I remember was a rather nippy -17 day! I would be very sceptical about claims that you "must have" a certain pair of crampons - like Nick said Gadd uses Sabretooths for everything and he's better on a bad day than most of us will ever be!
I would think that if money is an issue, I would worry more about not getting frostbitten toes than your crampons. I used to use my light single boots on colder days in Finland sometimes, but it's all single pitch, ab off a tree and walk back to the car in 10 minutes kind of stuff. In Norway I would always err on the side of caution and have warmer boots even if that meant they are a bit heavier. I've got Sportiva Baruntse which are superb, always cheaper than Spantiks and I got for a ridiculously good price late one season. But they don't seem to exist in the UK - could be worth looking at European shops though if you know you fit Sportiva.
Post edited at 21:38