Canon imagePRESS C60 vs. Xerox C70 vs. Konica Minolta bizhub C452

I'm not sure if we're really comparing similar products, but these have been offered so far. Which machine would you recommend the most? Besides from the ppm rates and max. stock that can be processed, what else should we consider?

Which one is better in terms of reliability, economy, productivity?

Any feedback will be trully appreciated.

Regards from México