I am buying the classic "round the Christmas tree" train for my husband and am COMPLETELY clueless (thankfully, he is too!)

We both want something simple but something we can add to every year.  It would also be VERY nice to have something from a B&O line since we met in Baltimore, MD. 

We live in Annapolis, MD and if anyone could recommend any train sets or store to go to I would very much appreciate it!!!