Just returned to the UK for our 2 week holidays and have been steadily eating my way through these 100% - Hotel Choc.
They actually do 3 types of 100% chocolates.
Saint Lucia
Dominican Republic
Coastal Ecuador (pictured above)
If you go instore they offer you taster pieces - if no one claims this 'free' chocolate I'll happily receive it
They are expensive - so you really want to try before you buy.
Aldi's choc (mentioned above - branded 'Moser Roth') - is also nice - I think the one I tried was 70% - I believe they do a higher cocoa content bar - 85%?