It's difficult to answer the question where the seafood buffet is best, because everyone has different tastes and preferences. However, the following are some seafood buffets that may be worth trying:

1. Starwood International Seafood Cuisine: Located on the 7th floor of Yintai Central Plaza, No.48 West Street, beilin district, Xi 'an, the recommended reason is that there are many kinds of seafood, which are delicious, elegant in environment and good in service.

2. Elegant Restaurant: Located on the 1st floor of the East Building of Sofitel Accor People's Building, No.319 Dongxinjie, Xincheng District, Xi 'an, the recommended reason is that the environment is elegant, the dishes are rich and the service is good, but the price is relatively expensive.

3. Western Restaurant of Metropark Hotel Epang Palace: Located on the 1st floor of Metropark Hotel Epang Palace, No.158 East Street, beilin district, Xi 'an, the recommended reason is that the seafood variety is relatively complete, the environment is elegant and the service is good, but the price is also relatively expensive.

4. Ramada Mega Ree Hotel buffet western restaurant: located at No.79, North Street, Lianhu District, Xi 'an, it is recommended for its elegant environment, rich dishes, good service and moderate price.

5. Prince's Food Club: Located on the 2nd floor of Maike International Building, No.33 Tangyan Road, Xi 'an High-tech Zone, it is recommended for its rich dishes, elegant environment, good service and moderate price.

The above are some seafood buffets that may be worth trying. You can choose a restaurant that suits you according to your taste and preference.