Thank you, Iowa, for posting the pictures. The Korean maple has been sampled here and given the thumbs down by one of our prominent nurserymen. However, being fair I believe they were testing it without any special care. I wonder how it would fair with special site consideration as kruege84 mentioned.
Here in our valley one of the problems we encounter on a very regular basis is early bud break and late frosts. It really is so typical that I'm not sure we should even call them "late". The experienced gardeners won't plant their vegetable gardens until June 1. So can be a bit challenging.
However, containerizing and a bit of protection could bring in some fun cultivars. Will have to get experimental here.
Sylvia