I spent the last week in Spain and by mistake I found "Queen in Nuce". I noticed it was mentioned in one of the topics earlier. "Mad the Swine" and "Going Back" sounds best to me from that album. The last song on the album sounds a bit like Brighton Rock and its also pretty good. I also found a cd called "the Queen Symphony". Have you ever seen these albums? Do you know any other "unofficial" albums, or dvds? I would buy the other cds in that case.
"Ghost Of A Smile" has far better quality Smile-songs than Queen In Nuce! If you can find that one, buy it! Also includes "Doing Alright" performed by Smile.
As for Mad The Swine, u should have the US Version of the "Queen" album, again beter quality. << Official Release, maybe out of print dunno.