Yup, SF Sorrow almost unanimous throughout.
I think a few of their other LPs are not too far behind either ( in my book )
Zombies seem to be in second place.
There are a lot of artists not too well represented, for myself, Beach Boys, Love,
Hendrix, Buffalo Springfield, Floyd and many others...it's not that I don't love
them but it's hard to pick a particular LP

I see you have Gentle Giant on there Wallace,i only heard Gentle Giant for the first time a few weeks ago,i didnt really know what to expect but i took the plunge and bought their self titled album on cd,i must admit to really liking it,some nice stuff on there,so thats been my discovery of the month.As for Procol Harum,both albums you mention are excellent.I see youre another one who has SF Sorrow by The Pretty Things on your list,this seems to be the most popular album out of all the lists,so i take it on this forum SF Sorrow beats Pink Floyds "Piper at the gates of dawn"as peoples most popular listen?I was surprised how few gave Pink Floyd a mention on their lists!!Interesting!!

The curious thing about Gentle Giant is that the Brits themselves didn't think much of them. They made it bigtime in Canada & Italy.
Funny how things like that happen.
The Canadian band Mashmakan really hit it with the Japanese audience, who knows why.

Stuart- I guess you know SIMON DUPREE & THE BIG SOUND? This is pre-Gentle Giant and popsike, not prog.

Mr Whoppo,
totally with you on Fools Gold,didn't get it either.
No jangle, no harmonies.
Strangely it's probably their best known song in the UK, always on the radio.
I much prefer the exquisite guitar goings on on the flip.
Mostly festivals here too and the ones that weren't sold out in less than a half hour...I tried!