They are now ready to provide me DCB LTF after mail conversation in place of intermiles signature LTF card which is going to be phased out, bt they are asking me to send upgrade form via e-mail, is it good to have DCB LTF or Regalia LTF( offered before mail conversation) pl suggest which is good to have, as I required only LTF card otherwise I can go with infinia as my existing card limit is 12.5L bt it's with annual fee as of nw