Following the post on the AW3423DWF here, I noticed this monitor in the outlet/refurb store.
At the time of that post, the price was $1,400+. It was dropped late last week to the $889 figure. Bought one, seems to be more stock available.
This non-F version has G-Sync Ultimate instead of the Freesync equivalent, is generally more expensive, and has a slightly higher refresh rate.
Note that one of the major critiques of this monitor on sites like rtings.com was the lack of firmware updates. That has now been resolved and you are able to update the firmware, if necessary.
If you're in the market for an ultrawide, this is the best you can do currently imo. Looks like there's still a fair wait until we see a future gen of OLED tech in this format.
Is it worth paying extra for new over the refurb? What's the quality of Dell refurb monitors like?