i differ there; i prefer songs rather than orchestras, with the the possible exception of Pugliese, 'cept even there, there are a dozen creme de la creme pieces...
I don't see a reason to prefer one approach to the other: there is value is getting to know the work of an orchestra, in depth, and also in getting the breadth that comes from being familiar with versions of songs across different orchestras, or combining both approaches, and knowing versions of the same song, by the same orchestra, over time (where they exist).
It's all good.