Looks like it might be a Kaho Satsuki. I picked one up at Brussels about 8 years ago when you could still buy imported trees for a reasonable price. Will post a picture when it starts flowering. I have about 10 flowers open right now but it usually covers the entire tree with blooms of multi-colors. I would think that all my azaleas should me flowering by this weekend. Hopefully I can get some pics and post them.