In before “you should drink sake or beer” scold arrives in the thread.
You appear to be blessed with an abundance of great options. Any Champagne with good acids would seem to work well. Chablis or White Burg would work fine too, though probably Champagne is a more perfect pairing, especially considering omakase can include beef and other things in places.
I had 08 Cristal on Wednesday and the bottle was really singing - so much intensity to the flavors and spices.
Jeff, Champagne across the board is great with Omakase. For me, I like to drink more than one style and intermix with high end Sake. You will be getting such a variety of tastes and textures, that you will have fun with different Champagnes and Sakes and their interactions with the different dishes.
Whichever Champagne you feel like opening will be about as good as it gets to pair with a bunch of different courses. There’s no right or wrong answer from a pairing perspective. That said, I agree that ‘08 Cristal is nowhere near ready to drink.
Jeff, who the hells knows what tomorrow has in store for any of us so don’t hesitate on the 2008. You have shared you own multiple bottles so open one and taste some of the joy that is 2008 Cristal. FWIW, I have had both 2008 and 2009, and after finishing a few, I re-sourced some more. These are brilliant wines, and I prefer the 2009, along with it being one of my WOTY choices for 2019.
In my view of this hobby, we do ourselves a disservice when we avoid opening things because we want to wait. Find joy now!