I am using Citibank Platinum card for last 10 years and never felt the need to opt for any other card. They have amazing offers(always) and deals and also converting the big amounts into EMI option which is very good which will help you to pay back the amount in time with lower interest.
I have been using since 2002 and in 2006 after making payment on time, my credit limit was increased and is a sign that your Credit Rating too will improve.
I suggest you to go with the Citi Card, you might have to face few hardship to get it due to the stringent verification process of the bank. And the service and customer care is also very good. The call center agents always are helpful and have answers to all your queries. They have a fraud protention plan in place and calls you every year to verify your details which shows that they care about customers