No, there's no opinions about that around here at all...

Assuming you really mean Apple Lossless, you could go either way, really, as far as I'm concerned. It depends on what devices you're going to be using it with.

If you really mean AAC, FLAC is going to have better sound since it is lossless. Even at high bitrates, AAC is still a lossy scheme.

I am the Doctor, and THIS... is my SPOON!