Personally, I would like to convert to a minimum of 32-bit float ALAC, but I'd settle for 24-bit integer. 16-bit is too. I've heard ALAC has the ability to support 384kHz, 32-bit float, perhaps even 64-bit Floating Point (IEEE) the way WAV files can.
Can anything export or convert to 32-bit ALAC with a minimum of 44.1kHz and 256kbps?