The Vox's power management is awful as of the current firmware, v15. If you let the Vox handle power management, it often refuses to wake up wifi (if it wakes up at all) and you need to power cycle it to fix it. If you leave wifi on, the battery life goes to hell. I'm returning mine this afternoon.
If there's a cyanogenmod release with the market for it in the future, I might pick up a new one again just for CM. The Vox's Kobo app is the exact same one that can be downloaded through the google market, so I wouldn't be losing anything by going this route.