Valiant have such a nice taste and are so hardy. Fresh eating is such tough sledding with all of the seeds though. Am just learning winemaking and have read they aren't a great wine grape but sometimes I like learning the hard way
I know of someone as far North as Saskatoon that's had success with Concord. The wine store said they know of at least a couple people that grow locally in a sheltered spot (I.e. South wall).... so its definitely possible.
The one I'm giving a shot next spring is Somerset. Supposedly sweet and seedless. I know there's been some success in North Dakota and have found at least one site that says they can go as low as zone 3 so no harm in experimenting with a cutting. If anyone knows where a guy could get a Concord cutting I'd give that a shot too! Would be interesting to hear about any other off the board varieties people have had luck with in our zone.