I am using Citibank Step up.
I am not maintaining a 5 figure sum in the bank account, so don't really bother.
Calculating the interests rate and flexibility differences, i would choose citibank. As most of the monies will be somewhere else, just a transaction bank.
If not CIMB is one of the "best" in terms of interests rate if you want to park your monies permanently with extremely minimum transaction.