Congratulations
Happy anniversary. Even though I was rooting for Corian, I'm sure you will be proud of granite. It is a great material and you should enjoy it for many years. If you are re-doing your shower in tile (great idea), be sure not to go too cheap on the tile installation. Behind the tile, there should be a concrete-based board, not just drywall. Also Moen makes some great shower valves. They finally came up with a great 2-knob design. One knob for temperature, one for pressure. You can finally adjust 1 without changing the other at all. My folks installed some of these valves about 2 or 3 years ago, and I think they are the best improvement in bathroom design in the last 50 years.
Congratulations,
Dave