Lumia 830 upgrade

Current Lumia 920 owners from the WPCentral forums are wondering if their next phone should be the Lumia 830. What do you think? For example, Fade_z is looking for a good follow-up to the 920 and thinks the Lumia 830 is the perfect match so far.

There are several responses already in the discussion. Forum member, Tips_y, thinks that it's kind of strange to come from a model that starts with Lumia 9xx and "upgrade" to a lower number, but the Lumia 830 gets a newer processor, bigger screen, better camera, and a microSD slot.

Others are skeptical. Forums member, steve_w_7, is concerned that the Lumia 830 won't get the 'Hey Cortana' functionality when it rolls out with the Lumia Denim update. This limitation makes him wonder what other upgrades he might not be able to take advantage of in the future.

What do you think? Is the Lumia 830 a worthy "upgrade" from the Lumia 920?