So far, I heard the banks that offer GST waived or cash rebate (with some conditions) are SCB, Citi, UOB, Public, MBF, and RHB.
I would think RM50 waived is just to attract you. It still depends on the card's advantages/benefits for long term. If you go to each bank's website and check it out, you can have better decision on choosing the right card instead of asking a general question here as everyone will give you different opinions. Different cards for different needs.

Since you are a new applicant, you might easily get into credit card debts if you don't educate yourself enough on credit cards.

Recently National Cards Group is educating people on credit cards by providing advices to cardholder, something like Swipe Smart 6E. I'll advice you to go through it.
SS6E

And I suggest the first page can place such information.

This post has been edited by moto_e680i: Nov 22 2010, 11:20 PM