Given what given what you have said you are looking for you have described the sound of the Harbeth SHL5+’s. I am happy owner of the SHL5+’s but I have never heard the B&W CM10’s and can not compare the sound of the two. There are a few pairs of the SHL’s for sale on AGON right now for good prices.
My only caution would be that you probably can’t listen to them before you buy unless they are near you. For me, I would not buy any speaker I have not heard personally. Any opinions you get are just that and are based on the listeners priorities and experience with the speaker they know. I have always believed that the speaker is the most important component in a system and you need to start there. Have you discussed this with your audio dealer? They may have some good advice for you. Good Luck!
My only caution would be that you probably can’t listen to them before you buy unless they are near you. For me, I would not buy any speaker I have not heard personally. Any opinions you get are just that and are based on the listeners priorities and experience with the speaker they know. I have always believed that the speaker is the most important component in a system and you need to start there. Have you discussed this with your audio dealer? They may have some good advice for you. Good Luck!