I voted FPGA Arcade because it's an open system, but I'll end up buying Natami too. I think in the long run FPGA Arcade is the more viable platform given that it can be extended etc. - we've already seen the benefit in that in how it draws on the Minimig cores and TG68 core, and who knows what new generations we could get of it in the future thanks to that. Also the price is right

On the other hand Natami is likely to be the more exciting one "short term" given all the new functionality...