I heard a Benz Micro Ace a while ago and found it quite balanced and musical and entertaining. From what I subsequently read, it's actually a better-balanced cartridge than the Glider, and more satisfying in the long run, in this sense (musicality and balance) also "magical". I agree with Twl, your money is better spent on upgrading the 'table, or on more records, the Ace is a class act.
Koetsu catridges were designed on idler-wheel turntables, which have very powerful, tight bass, due to their great torque. I suspect that mounted on such a 'table (or a large direct-drive such as the Technics SP10 MKII) instead of a belt-drive, the Koetsu would be found to have excellent bass with sufficient control, the weak bass exposing a belt-drive weakness vis-a-vis 'tables with better speed stability (more torque to overcome stylus drag).
Koetsu catridges were designed on idler-wheel turntables, which have very powerful, tight bass, due to their great torque. I suspect that mounted on such a 'table (or a large direct-drive such as the Technics SP10 MKII) instead of a belt-drive, the Koetsu would be found to have excellent bass with sufficient control, the weak bass exposing a belt-drive weakness vis-a-vis 'tables with better speed stability (more torque to overcome stylus drag).