I just wrote a reply here, only to have it disappear into the interweb hinterland. If it does appear eventually, you'll know why there are two similar posts!
If you get the chance to try ox-cheek then grab it. It is rich and tender, and best of all doesn't need all day in a low oven to make it edible, as with many cheap beef cuts. The first recipe I tried with it cooked in 90 minutes. There is a gelatinous layer through the middle with makes any sauce rich and unctuous.
The cut I just don't get is lamb shoulder shanks - it doesn't look as if there is any meat at all on them. I suppose they are for flavouring soup.