The best rates are usually from those Saving a/cs which require salary to be credited, credit card spends, etc. - OCBC 360, UOB One, BOC SmartSaver, DBS Multiplier, etc. But this type of saving a/cs have a cap on the amount to earn the bonus interest.
If you are comparing HSBC EGA, StandChart e$aver, MayBank iSAVvy, CIMB promo, the happy news is HSBC have updated their HSBC EGA bonus interest rate today - this made HSBC better. You can go to HSBC forum thread or to HSBC bank website for more info.