I dunno. If you can't stomach ethno-fusion-jazz-rock or whatever you want to call it (I can), anything after Opal isn't gonna be your cup-a-tea.
There's some pretty heavy freaked out stuff on most of their records, though, which is why I like them more than your average ethno-jazz noodlers.
There's a pretty excellent video of Embryo playing with some Indian musicians on Youtube. It may be more up your alley.
http://youtube.com/watch?v=-2k3dVYEeN0
http://youtube.com/watch?v=2fHS5JEHy...elated&search=
related...
http://youtube.com/watch?v=Uc2w6Nv04...elated&search=