Yes, my comment lacked specificity. I'm well aware of the difference between lossy and lossless music formats. My reference to buying "digital" is simply a reflection that it's hard to find Classical online for sale in any digital format (particularly if you're looking for a specific ensemble, conductor, soloist, or recording), much less in lossless formats.
My opinion is that lossy classical music is not worth buying at any price (with the exception of something like the Naxos streaming service I endorsed where you're not looking for permanent additions to your collection, but the ability to sample their entire catalog at will). If you must purchase music in a digital format online, buy FLAC or other lossless encoding method preferably (though options there are fairly limited), and at an absolute minimum, 320 kbps or lame alt-preset-extreme equivalent or better (and even this is hard to come by at shitty stores like iTunes or Amazon). Anything less and you are simply wasting your money.