Synapse Audio Dune 3
Amazing Sound, Low CPU
This is one of the great "supersynths," however unlike many of them, the CPU usage is so low (lower even than Sylenth1). It sounds great and is incredibly flexible, with FM, Wavetable, Analog, and a great Virus-like Unison engine. A must have.
Great synth. I demo'd this alongside serum, and Dune has serum for breakfast and spits the crusts out. It has a far superior audio engine. Serum may have more modulation possibilities in regards to routing destinations, but why would you want to route inferior sound, when you can have sound like this. Dune has one of the best sound engines I've ever heard. Really high quality.