"Plumb" is indeed brilliant. I like the way they use a synth bass in a Beach Boys "Holland" -style.
The Week That Was album is probably my favourite at the moment. If you like the darker moments of early 80's Genesis ("Mama", "Dodo/Lurker" etc.), Gabriel's third album, Peter Hammill's "A Black Box", Rupert Hine's "Immunity", Kate Bush's "The Dreaming" and Wire and Gentle Giant, grab this album immediately.