I'm surprised no one mentioned Warre's Warrior. It is my personal favorite. I told my wife I wanted a bottle of Taylor Fladgate 1863 single harvest and she said okay until she saw the $4000 price tag and smacked me in the back of the head.
Around Thanksgiving, Costco starts selling its Kirkland Signature 10 year old Tawny Port, for less than $20.
It is a very good wine, reportedly produced by the Taylor Fladgate head winemaker. I always stock up when it's available.