I found the K75 very midrange focused, but lacking in the high end. I guess you could call that warmth. Personally i am not a fan of them. I also found the ClarityCap ESA's a bit the same, contradictory to their name.
These days my go to choice are the Jupiter flat stacked as they sound the most natural to me. I'm so fond of them i have them in three different amplifiers at this stage. The Mundorfs are nice caps too, but i found they can sound a bit too sparkly at times. I haven't tried the Silver/Gold/Oil variety, only the Silver/Oil.
Another good group test here
http://www.humblehomemadehifi.com/Cap.html of the ones i have tried i agree with his comments.