As I recall, you were very fond of the Tivoli PAL - the Henry Kloss designed AM/FM portable. Any particular reason you didn't do a comparison of that radio with the Music Hall RDR-1?
Regarding personal FM transmitters, I certainly agree that one needs to find a spot in the band with no strong adjacent stations. Whether one is, "..certain to find a nice empty spot on the FM dial.." without strong adjacent stations depends on location. In metropolitan Chicago, it's next to impossible.