Should I Buy a Used Koenigsegg CC8S or Wait for the Next Generation?

I'm torn between purchasing a used Koenigsegg CC8S and waiting for the next generation model. The CC8S is an exceptional vehicle with impressive specs, but I've heard rumors about the upcoming car's potential to surpass it in terms of performance and technology. Should I take the plunge on a pre-owned CC8S or hold out for something even better?