If there's availability at the Meridien and the Swissotel you may want to book through an American Express Travel Agency. Through their "Select Rate Program" they offer rates of NLG 320 at the Swissotel and NLG 333/374 (single/double) for a Standard room and 357/403 for a superior room at the Meridien. The Swissotel also includes continental breakfast. You may need to encourage the travel agency to check the AMEX Select Rate Program Rate - sometimes they need to be reminded that they have negotiated corporate rates!