[Rathji]

Ok I don't normally use complex smart lists, instead I normally use them as a quick way to group albums together.

What you are asking for seems impossible.

What you need is this

(Artist A OR Artist B OR Artist C) AND ( Rating > 3)

using 'Any' is the same as :

Artist A OR Artist B OR Artist C OR Rating > 3

which will show you any song by any artist or combo of those artists and any songs by any artist which have a rating of 3 or more

Using 'ALL' is the same as

Artist A AND Artist B AND Artist C AND Rating > 3

which will give you all songs that all artists were involved in ( and individually named in Artist, like Crosby/Stills/Nash/Young ) that have a rating > 3

If you drop the > 3 rating, it is simple though.