I may be looking for a great deal too far in advance on this one....but, if anyone can find one, I'd be most appreciative.

Need 1 room/2 persons December 6-9 at one of the nicer London properties. Have experience at Grosvenor House and love it, but have wanted to test out Chancery Court as well. I have checked frequently but it seems Marriott is staying ahead of the pack on lowest rate. I also know of only two sites I can use to try to get a price match that may be accepted. If anyone has suggestions of sites I can use on my own, I'd appreciate a PM. Thank for the help.