Ritz Carlton, the best overall
Having had the good fortune of my company putting us up in diverse upper class hotels around the globe, and having used hotels for about half the month for the last 35 years, I have to place the Ritz Carlton Chain at the top. They are head and shoulders above their next competitor. I have enjoyed the Ritz at Battery Park - New York, Georgetown - Washington DC, 22nd Street - Washington DC, Tysons Corner - Virginia and a few others. Their service and efficiency is almost flawless, and if once there is a slip, they are not only apologetic, but fix it immediately. The strange thing is that although they are in a high price segment, their prices are not that much more than the Hilton and its competitors. If you can afford this class of hotel, I would recommend the Ritz Carlton anytime.