Tedr227's characterization of the PMC IB1 is incorrect. The IB-1 actually does strive for accuracy. I own the IB-1's and have listened to Harbeth M40 at a local Harbeth audio dealer. They are both wonderful speakers, however, the more expensive IB-1 has much better bass.
PMC IB1 Vs. Harbeth M40
I'd appreciate your thoughts on how these two speakers compare with each other sonically. I know the PMC speaker is much more expensive than the Harbeth speaker, but both are large monitors and their companies' flagship speakers and both are used in professional settings. Thanks