Hi Turtle,
Just wandered downstairs to go through the CDs. Apart from La Decouverte ou L'Ignorance, I have URBA (1978) and An Heol A Zo Glaz Le Soleil Est Vert. Both of which I remember as being good (I keep putting La Decouverte ou L'Ignorance on). The one I hated was called Le Vaisseau de Pierre (arrangements Tri Yann 2 (1988) and has the wording Gwerz Fantastique Contemoraine - Nouvellement Composee. I heard it once in 1989 returning from france and have never played it again. I just remeber disliking it - may put it on in the next few days to remind myself - it was very different.
Regards Rana