Huh? As far as I know, iTunes store does NOT offer any apple lossless files for sale. All the songs for sale at iTunes store are AAC compressed files just like MP3's, and they have the audacity to charge 99 cents for the piece of crap MP3 song.
It is also not true that WMA sounds "better" than Apple Lossless. If you rip a song off a real CD, into apple lossless, WMA lossless, and Flac, the sound quality of each is the exact same, all else being equal.
However, all is not equal, and if you play the apple lossless files from iTunes (from a PC, not Mac), it will sound substantial inferior to say Flac version played from Foobar/ASIO on a PC. This is due to the difference in the player program (iTunes vs. Foobar/ASIO), not the type of lossless files.
I have confirmed this many times by playing the apple lossless file in iTunes, heard the inferiority vs. Flac/foobar. Then I would take the exact same apple lossless file and convert it into another Flac (using dbpoweramp, etc), then play it on Foobar to hear the exact same sound as the original Flac.
Same thing with WMA lossless. If you take a Flac file, convert to WMA lossless, then convert the WMA lossless to apple lossless, the files sound exactly the same. UNLESS you play the apple lossless on iTunes on PC (don't know about Macs), which will sound worse due to iTunes/PC issues.