I've not been pleased with the lap belt fit on the kids I've seen in the Evenflo booster.
My daughter is in a Monterey and it is fabulous on her. I have to have the headrest up 1 notch or so higher to get a good shoulder belt fit, but despite her being tall and on the thin side it fits her well. Vehicle seatbelt geometry may influence that.
I will say that after you see the lapbelt fit on the Monterey, other boosters have a harder time measuring up.
The Kobuk I've seen at a local store, but didn't seriously consider it for my dd. It would be the biggest pain in the butt to buckle because of how the armrests are very close the the seat itself - leaves a very narrow space for routing the seatbelt through and I'm not sure even my daughter could do it and she's quite good at buckling the monterey despite how the buckle sits right against it.
Turbobooster seems to fit kids well - just doesn't go as high as the parkway.
Oh - and since I haven't seen it mentioned, being as you are in Canada right now, it's important that you get Canadian seats. There are some differences in standards between the two countries, and it is also illegal for a Canadian resident to use a US seat - all provinces require that children be restrained in CMVSS certified seats. :thumbsup: