I’m always impressed with the Native Instrument software synths. The first FM synth (FM7 is reviewed here) was already great, designed like the DX7, able to load presets and extended with filters and effects.
Anyway, the FM8 has dropped the Yamaha’s DX-series feel and has become an unique next-level FM-synth at itself. Check it out here:
The price, well about $250,- you could buy a few genuine CX5M’s for that, you decide 😉