The migration is complete! I followed the directions in the wiki regarding transfer of the data files and all went well except for transferring the WeatherCatBackups or WeatherCatData (can't remember lol) folder ... I couldn't open the library on my cloned external HD so I couldn't drag it to the new iMac, and found out that it would fill 2+ DVDs ... so I'm moving on without it. I'm assuming I don't actually need it going forward but I may be wrong. Also, I did need to install the driver but that was easy. Anyway, all the data from 2011 when I got my Vue is there!
Thanks again for pointing me in the new direction. FWIW, the new iMacs are sweet.