Vortex Sound Research

Hi all

I'm on the hunt for a monosynth with some serious modulation capabilities to add to the arsenal. I think my dream would be a Cwejman S1 MK2 but there's no way I'm going to be able to afford/get one any time soon. Are there any alternatives out there with similar modulation capabilities for a more reasonable price? I love the precise sound and ability to finely shape the sound that's possible with the S1 MK2. I've also considered the MS-20 but would love to hear other opinions if there are any other synths out there that can stand up to the Cwejman.

Thanks in advance!