Yeah exactly ... perhaps it depends on the music (does actually to notice it more) but higher bit rates really do make the difference (particularly for some music it's very easy to pick the difference.) Why what are you worried about with an extra 1-2 MB per song to have them as 320 kbps. Is it really going to devastate your space on your HDD?
Anyway what this thread is really about is sharing "more" lossless files. Not anything to do with replacing mp3's with lossless.
It's easy to say share a particular lossless, but not all apps handle particular lossless formats. lol
You should have abilities with as many of them as possible. Converting to another lossless format is not an issue since they are lossless.