Flac conversion for ipod?

I am interested in any answers to this. Anyone having success buying high quality HD Tracks and converting FLAC to apple lossless for use in iTunes?

Yes. Max will do exactly what you says. I have purchased hi-res FLAC tracks
from HDTracks.com and converted them to AIFF using Max, and played from
iTunes without any problem.

I agree, Max works well for this. Besides AIFF, Max can convert FLAC files to Apple Lossless and other formats that will work on an iPod.

I have converted both 24/48 and 24/96 purchased FLAC files to Apple Lossless for playing through iTunes at better than CD resolution.

Max is the ticket. I also purchase from HDTracks and use Max. One other cool thing is that you can tell MAX to automatically add the converted file to your iTunes Library upon completion of the conversion process. I typically que up all my downloaded music, hit go and watch a movie or whatever until it is completed, next time I look at iTunes my newly converted files are there and ready to go :)