Montepilot: The one Classic reissue of the Heifetz recordings that is problematic is the Bruch Scottish Fantasy. I love the reading, but there is a constant low frequency rumble in the recording (either subways or the conductor bouncing on the podium) that is very distracting if you have a full range speaker system and don't have a rumble filter on your preamp (remember those?). It is not noticeable on the original pressing, which I have, because it rolls off the lows, but the wider frequency range of the new pressings actually seems to be a disadvantage in this case.
I think you should also get the Rozsa concerto, which has been such a standard for the piece that few violinists have dared to record it. He may miss a few notes here and there, but his fire makes up for it, and the recording is pretty good. Of course, as with all the Heifetz recordings, the violin is spotlit more than you would hear in concert, but then again, are you paying your money to hear Sir Malcolm Sargent or Heifetz?