With XLD it is drag and drop conversion keeping directory structure and automatic adding to iTunes if wanted/keeping the tagging in the files as well, otherwise there is Clementine you could give a try.
Hmm never run into that I literally did thousands at a time once when I converted my entire lossless .m4a to low bitrate .m4a to put on my iPod when I got it.
Man thanks for the recommendation! Absolutely love this! Precisely what I'm looking for (for a while now). New to Mac. Use to use foobar on the PC and haven't found a good FLAC player for the Mac yet, until now.