bk,
If you have not investigated PLANET EARTH on Blu-ray, you really must. The episodes are only an hour long and never wear out their welcome, and yet each one is filled with so many stupendous visual treats that you'll eagerly revisit them making the set well worth the investment.
After finishing the entire set, I was left with such an overpowering respect for our planet and the amount of life it sustains, both plant and animal, and PLANET EARTH touches on every aspect of it with breathtaking visual imagery.