Wow, they retired the Vox? If I had bought a Vox, and was not able to return it, I would be quite mad that Kobo did not offer a trade-up program towards the Arc. It seems to me that the Vox was either a paid beta, or a simple quick-cash scheme engineered to cash in on beating the Fire to the Canadian market.
I wonder if pumping up the share price for the sale to the Japanese company played into it as well. Either way, I am sure the Arc is infinitely better than the Vox, but personally, I would not trust Kobo with my money again.