Hikari is one of my favorite ayce Sushi place in LV. I also like Sushimon in similar way. For the price and quality, these two are my favorite. One thing I like about Hikari more is that you can order sashimi plates. Too much nigiri will fill you up fast due to the rice portion but Hikari will serve you sashimi plate of anything. So if you are Sashimi fan this is the place to go.
If you are not in a budget, there are few high end Sushi places in town you can go. Quality is great but you pay the price for it. For AYCE & price, Hikari and Sushimon/Goyemon shines!