Jim,
Welcome to the true world of Standard Cymbidiums! The hybrid cymbidiums of today originally come from the species, those plants growing wild in various parts of the world. They come in classifications of miniature and standard. Your previous plants evidently came from the miniature heritage and the new ones from the standard heritage. The standards need a cooler climate and a lot more room to grow.
For more information, check out the various growing links on this forum and come back with specific questions if you have not gotten all the info you need.
Good luck with your new acquisitions.
Cym Ladye