For what it is worth, if I was to list my three favorite Genesis albums...
Abacab
Wind and Wuthering
The Lamb
Duke would be next on the list. (This isn't including live albums).
Kev, if you are a fan, you might want to seek out the "Classic Albums" documentary on "Face Value". On there, Phil does a solo version of PLease Don't Ask with just a keyboard that is heartbreaking. Famously, he presented a number of songs (Misunderstanding, Please Don't Ask, In The Air Tonight, and I Missed Again) to the band, and they settled on Misunderstanding and Please Don't Ask.