The finalists:
JOHN DAVIS - Explorer rose
A large shrub or small climber that tops out at 8-10'. Galetta Nurseries tells me that it has a "light fragrance" and that it "blooms profusely from June until frost". Eeeeexcellent.
ALCHYMIST - hardy rose
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Also largeish at 5-6' tall and wide. Only blooms the once, but it's apparently deliciously smelly. I've also read about this brilliant idea of sending a clematis to grow up the canes of a climbing rose, so that as the rose is finishing the clematis is just starting up.
SEAFOAM - groundcover rose
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As posted about before - similar to the Fairy, I gather, only white instead; Canadian Gardening had all kinds of good things to say about it.
MORDEN BLUSH - Canadian Parkland rose
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More compact than most of the others, 2-3' tall and wide; but Galetta says it's another profuse and continuous bloomer, and that it tolerates heat and drought very well, which would definitely be a plus in the spots I have in mind for it.
CHAMPLAIN - Explorer rose
Also in the 3' range and a continuous bloomer. I am a sucker for a really red rose.