I'll throw this out here... I stayed at LeMeridien in Siem Reap a couple years ago, before the merger announcement and can wholeheartedly recommend it. It is well located, just north of the city, but an easy tuk-tuk ride away. The rooms were nice, the service great and the breakfast quite good. The pool was quite nice. There was a loud tourist group that arrived my second day. The hotel staff actually warned me as while I was checking in that the group would be there the next day, but it really wasn't that intrusive.