And if you want a (relatively) fast pick up of your hire car at MCO, Virgin Holidays have a dedicated Alamo desk. We met friends at MCO last month......they had booked their FD elsewhere and joined the very long queue at the regular Alamo desk, along with most of the passengers off the plane. It took them an hour to get their car keys.
Of course you could do the car hire paperwork before collecting your luggage - we've used this method to good effect in the past.