Well, the way I see it the Beseler is probably the wise choice since you are on this side of the Atlantic. They are good machines and will handle negatives up to 6x9 cm. The enlargers are common, and still in production. If you need accessories and/or parts, they are readily available both on the new and used market. Kaiser enlargers look like really good solid machines, but they are not terribly popular or numerous in the US. That alone, would deter me from buying one. I've had too many machines that were not common here, most notably a Renault sedan I once owned, that gave me hell every time I've needed a part or service. The situation for Kaiser enlargers might be different in Canada.