I need a downtown DC hotel and am trying to decide between the Washington Marriott at Metro Center and the JW Marriott. Are there any advantages to staying at the JW Marriott? I am in town for business, and the Metro Center location is a bit more convenient and costs a little less. But aren't the JW Marriott properties supposed to be more luxurious? I don't mind paying a little more for better amenities. Any advice would be appreciated! Thanks in advance!