I don't have any experience with the Gershman's, but I have owned a pair of Lorelei's for over a year and I believe they are a fit for what you are looking for. They are non-fatiguing and very musical. I have them playing constantly and I never get tired of listening to them. You can get more info from other owners on the Odyssey Circle at Audiocircle.com. For what it's worth Klaus has a trial period, so you wouldn't be out much, if you didn't like them.
Good Luck in your search
Jeff
Good Luck in your search
Jeff