Victoria & Albert's is the finest restaurant at the World. Chef Hunnel has been nominated for the James Beard Award - repeatedly - and there are only a relative 'handful' of nominations out of more than 44,000 candidates. Victoria & Albert's itself has also been James Beard Award nominated, and it has garnered tons of other awards and accolades.
Jiko, California Grill and Citricos are all excellent (but CA Grill is being refurbished for at least several more months ...). "Best" will depend upon your preferences ....