Sonus Faber Auditor M

I was interested if finding out if people think the new Auditor M's are really worth the price increase from the previous version. Should I try to find a used pair of Auditors or are the M's such an improvement to the already terrific Auditors to justify the price?
I have the Cremona M's and they are a serious improvement over the original Cremonas. That said, a large part of the increase is due to the diminished dollar vs. the Euro. You will find most high quality imported products increasing their prices if you revisit where they were several years ago. Tough time to buy imports. On the other hand, US companies (McIntosh, ARC, Thiel, etc.) are a great value overseas now.