I am currently having hard time to make my mind between those 2 monitors.
I have both in my studio at the moment
The SC307 are very smooth monitors with a punchy low end and a beautiful high frequency.
The KH310 are amazing chirurgical tools, love the mids on the neumann but I find difficult to get accustomed to their low end it's very punchy but dry, also being closed cabinets the lows don't saturate the room like the Eve does.
The Eve is very pleasant yet accurate, the KH310 is so precise but not as fun to use.
One question to all the closed cabinet monitors owners, is it normal that the perceived bass from the neumann is less than the ported eve?