I have the first and the third on your list. I know Robert Hand's interpretration from visiting astro.com.All three are good, but Skymates: No.2 works better as an additional reference rather than a main reference, in my opinion. I refer to Townley's book a lot and it also discusses aspects to the ascendant and the nodes, which is nice.
My main reference for composites is "Planets in Synastry: Astrological Patterns of Relationships", by E.W. Neville. This book is great because it gives interpretations for both synastric and composite aspects and placements.