Cannot second this. I have a pair of Mackie HR824 (old version, inherited, currently used for Webex in the office 'cause no one in the family wanted to have them) and they are not bad at all. The K&H O300D are better in several aspects (precision, off axis response) but they cost much more, and I could well live with the Mackies if it's necessary. Also me and my brother both own a 1402 mixing console and they are reliable and deliver good sound.
I'm interested in the Yamahas because they have an ADC. Makes them ideal for measuering room response.