In Laurel, we have Pho 54 and Pho 88. Lisa and I both prefer Pho 54. There's apparently one in Burtonsville called Pho Real. Many folks seem to think that Pho Nam in Catonsville/Ellicott City is good. All of this from the following foodblogger's post:
http://howchow.blogspot.com/2010/02/pho-89-in-laurel-and-plan-to-visit-pho.html