Hey Roger
Not knocking your tests, they are pretty cool and very helpful. Just a little suggestion for next time.... I would not put the names on the files.
Humans are human after all and they are going to want the unit that they own or are thinking of owning to sound best. Even if they say they are not going to do this studies have shown that subconsciously it still takes place. The only way around it is a blind test and that means the person taking the test has no idea which data come from which unit.
So Roger, after using each unit what do you like about the final contenders?