I went to Sushi Ko on Thursday and had the multi-course RW dinner.
While all of the sushi (and the bowl of soup) was good one dish was memorable. I had a white tuna tataki (three pieces of lightly grilled white tuna) with garlic, avocado, red daikon and ponzu sauce. All the flavors blended together quite well.
It was wonderful. If you go give it a try... it's worth it! I didn't ask if it could be ordered ala carte but I suspect it can be.