Is it worth upgrading B&W DM303 to B&W CM2?


I currently have B&W DM303 and Cambridge Azur 640A V2 and 640C V2. I found an almost new pair of B&W CM2 at a good price. Like I said it in the title, is it worth upgrading DM303 to CM2? I mostly listen classical (chamber music 70% and all others 30%).

Thanks in advance.
brendel95
I prefer the B7W SE306Ei model. the Cambridge Azur 890A SEV1.1 is also a great unit
Cheers
Bartok, please list the other system components used in evaluating the B&W B7W SE306Ei and the Cambridge Azur 890A SEV1.1
I'm very interested.
Thank you.
Yes cdp is the Ayre SX3.70Di I did not care for the B&W EX900SEi model. I know it has good reviews but was not my cup of tea.
Cheers
Thanks but knowing all of the others components such as the amp, preamp, speakers, etc. would make this much more meaningful to the readers. Also where were these components heard, friend's house, retailer, etc?
Thanks in advance.