The first seven episodes of this Joseph Hogarty podcast/slide show series contains very interesting commentary and rarely seen (for me, at least) art work on the transformation of the Western and Eastern Roman Empires during late antiquity.
http://www.ahistoryofeurope.eu/A_History_of_Europe/A_History_of_Europe.html
The emphasis here is on transformation rather than fall of the West. I'm generally of the fall position alla Ward Perkins, but Hogarty provides some good evidence and visuals for something more gradual, especially in Gaul and Hispania.