An unexpectedly great FM synth, which sounds exactly the way a 4-operator FM should do. Although it imitates to a degree that fabulous interface of early Yamaha DX-series synthesizers, it is by far more intuitive and much easier to handle. Still it requires some awareness on what you do in order to get good timbres. Presets are mostly fine, anyway.
Sonar station about DXi FM synthesizer, v3.3.4