i have to say so far best ive eaten is saisaki at menara UOA...for the budget u gave of RM 50 u can get a buffet...not so much of sushi actually, but for the variety of food, sharks fin soup (not tat nice but heeck:p) , sea cumcumber, Unagi (oh i sapu dis 1), clams, oysters, fresh steamed prawns, calamari, scallop, crab and loads others...had time of my life...def would recommend u to go there...