I would highly recommend the Origin to anyone who comes across one used, unless it's in terrible shape for whatever reason. I sincerely doubt that anyone but Arturia will attempt anything like it. The only synth remotely like it is the Solaris, and it will cost you a LOT more, and in my opinion doesn't quite match it in what you can accomplish with it.
To do what the Origin does, you would need several synths. If you're lucky enough to own one, never sell it. It will be your secret weapon forever, and what you can do with it is unequaled.