This dealer only sells tube electronics, so, the Harbeths were not run with the recommended high-powered solid state amps. Still, Harbeth acquitted itself quite well. I particularly liked the 30.2 model for its lively, yet not lean or harsh sound. The HL5+ model was also nice, but, it was a bit more sensitive to placement and electronic choice and could sound not as pleasant as the 30.2 when its more demanding needs were not met. The 40.3 was particularly demanding of the right amplifier, and while it is a nice speaker, at its price it was a bit disappointing--it was too dynamically polite for my taste.
I don't know the model numbers, but the Graham that is about the size of the Harbeth 30.2 is a nice sounding speaker. It does not have the slight tendency to have a sharp edge or sibilance in the upper midrange that the Harbeth has, but, it sounded a bit drier than the Harbeth, so tradeoffs are involved. For a standmount in that size range, the ProAc D2 is also a decent alternative.
But, if I had to place a speaker near the corner of the room, my choice would be an Audio Note AN-J or AN-E. They might be a bit expensive, but, they are extremely muscal sounding speakers that sound great with the lower powered tube amps that I favor.