I pay £300 sterling a year for the Amex Plat card. I don't pay to get into airport lounges for myself and wife but I pay £16 sterling per visit for my daughter. My problem with Amex is not all outlets accept the card, and then I have to fumble around for Visa or Mastercard.
Morgan Stanley offer all the same incentives plus Mastercard is more widely accepted. I book all my trips through their Travel Councellor Service and their Concierge Service is available 24 hrs a day 365 days a year. Great service all for £200 sterling a year.