The dilemma being... which one do I go with? I like elements of both... I'm leaning toward the Maya Fluids one (the two bottom pictures) as the smoky effect is just so much more elegant than the 'blobbiness' of the Classic Particles (top two). But the Classic works much better for the big, imposing stylised shots near the end...
(which reminds me... need to get an animatic up here!)
Anyone got any ideas on how I can get the Fluids to spread in the same way as the Particles do?