Barry, I did not mean to insult Maestro Harnoncourt for his looks, but I do wonder if that scowl and his sometimes dour performances are related. After all, Lincoln said, "After 40, every man gets the face he deserves."
Akiralx, I agree enthusiastically on the Dvořák S6. I love those slamming tympani in the Scherzo!
Another conductor with a centenary this year is Witold Rowicki, in February. I don't know if he conducted Mahler, but his Dvořák symphonies with the LSO are very strong performances.