I'm also partial to the Heifezt version. The Acoustic Sounds reissue is superb:
http://store.acousticsounds.com/d/91416/Fritz_Reiner-Tchaikovsky_Violin_Concerto_Heifetz_violin-200_...
http://store.acousticsounds.com/d/91416/Fritz_Reiner-Tchaikovsky_Violin_Concerto_Heifetz_violin-200_...