Just got back from Arlington VA and a stay at the Residence Inn Arlington Capital View. This is a very new property (2 years) that is housed in the same building and with a Renaissance Hotel and both are owned by Marriott.
Thoroughly enjoyed the friendliness of the staff, great price, excellent and spacious hotel room with frig, stove, microwave...all the comforts of home. You can also cross over on the second floor to the Renaissance and enjoy their restaurants and other services.
Check it out, you won't be sorry. P.S. did I mention free breakfast and dinner included in their dining room and free shuttle service to and from DCA/Reagan!!!