The Lamb, Duke and Invisible Touch.
The Lamb remains their most beguiling work. Ahead of its time and so far removed from what everyone else was doing at this point. Genesis never did anything like it before or since; the music has real bite. Yes, the concept is flawed - Peter Gabriel is a singer, not a novelist, and this is the damning proof - but that seems to be part of its charm.
Duke. I may have voted in haste here because I could easily lose Alone Tonight off this album. That said, the album is more than a sum of its parts. The three-man lineup found their feet here and this marks the beginning of a new era for the band. Undoubtedly, Chester and Daryl's playing had a positive effect on the way the band wrote their music. They're looser, much more open to different styles of music and there's an appealing immediacy to the songs that doesn't feel like a compromise.
Invisible Touch. This is where I came in so, even if it wasn't the slice of perfection that it is, I'd still vote for it on the grounds of nostalgia. Every track on this album works. From the unashamed r'n'b of the title track, through the dense soundscapes and mounting drama of Tonight Tonight Tonight to the brilliantly catchy Throwing It All Away. Too young to go and see them on tour, I heard their triumphant performance at Wembley Stadium as broadcast on Radio One (this was back in 1987, when that station still played music) and it introduced me to a whole host of other tunes from their past. Phil Collins availed himself as their perfect front man during that show: self-effacing, unpretentious and a consummate performer.