First of all, the CM series is wood not a poser like 600 series, If you check B&W's website they have phased- out this lovely creation of simplicity by Morten Warren, there's a big difference in performance and dynamics, has better drivers pretty much replaced the CDM line, if you can swing it go for the 700 series. Last time I checked Audiogon CM series are being bought out right away since some would like to have in their collection, i've seen a used 9/10 condition sold for $1295.00 , for a brand new of about $1400.00 so the numbers really tell you that it has good resale value for a phased out product. Try to do a blindtest on both and CM & 600 series and your ears will decide.