The price of a Tempest make it a little impractical but definitely a good choice for a stranger style polysynth that’s really fun to play as one.
Other than that I second the Micromonsta.
I’ve been tempted by the tetra for years but it seems like a pita to me and I enjoy a good challenge
I feel like if there’s something about the DSI vibe that you really notice, nothing but DSI will actually scratch the itch.
Similar to something like moog, and only a moog sounding a particular way.