Yes, I'm using Rhapsody 6.  I actually like it a good bit better than Rhapsody 4.  The only feature it's missing from 4 is the equalizer, which I didn't use anyhow.  The browse and search functionalities are both much better in 6.  Search could still be improved alot by allowing boolean...

I'll answer my own question.  Just got the most recent update to Rhapsody's PC app.  It now allows you to choose from 3 levels for streaming.  The top level, at least for the tracks I've tried so far, is AAC 320 kb/s.

That's great to know!  Do you happen to know whether that is true for Rhapsody's PC app as well as their mobile apps?