This virtual analog distinguishes itself from other subtractive synths with the use of Morph Groups. By assigning two states within a single patch, you can ride your Mod Wheel to get a lot of wild sounds between the states. Synths are often described as "expressive", but this takes it to new heights. Sunrizer is great for pads and other evolving sounds. Read a full review here with a demo song done entirely in one instance of Sunrizer.
Disclosure: I received my copy for review from BeepStreet.