What is the best Jethro Tull album based only on musical talent and not on commercial record sales?

Oooohhh! I *love* Jethro Tull!

I'd actually go with the 'Folk' trio :~

Songs from the Wood
Heavy Horses
Stormwatch


Edit :~

Jack B : Yep, their 1987 album 'Crest of a Knave' was awarded the Grammy for 'Heavy Metal Album' !

I like AquaLung

Thick As A Brick and Aqualung

Thick As A Brick or Heavy Horses
Brilliant musicianship, and difficult to choose just one

heavy horses
with both aqualung

Thick as a Brick...Their first Proggy release.

Tull has much to be proud of. Their discography is simply amazing.

Thick as a Brick is not only the bands finest moment but one of the most essential progressive recordings of all time. A masterpiece!

I'm not really that familiar with them, but didn't they win a grammy for "best heavy-metal performance" at some point? As I recall, it was a big story because they are anything but a "heavy metal" band, lol.

" BENEFIT "