Start with the first album. They never did better IMO.
I don't understand why many (including the Penguin guide) consider the later albums to be superior.
A bargainous download of the Jaco years albums on Juno here
Doh I'd forgotten about the Comet is Coming.
I reckon Weather Report's best album (by some distance) is Sweetnighter
Truly fabulous. For me, the latter stuff was spoilt by Zawinul's often rather naff and dated keyboard sounds. I think he ended up with too many keyboards than was healthy...
Totally. Always dismissed them on the basis of borrowing Heavy Weather off someone at school, then I got round to getting their early albums about 20 years ago.
Sweetnighter's their last album I can listen to.