...If you want to just get the DP version and grab a taste from the upgrade fountain, follow the instructions in this link:
http://forums.windowscentral.com/win...questions.html
It's your choice on whether you want to go this route, but I personally have had any problems with the WP 8.1 other than a slight increase in battery drain on my L920. If you do decide to take this route, and you don't like it, you can revert back to 8.0 following this thread:
http://forums.windowscentral.com/win...ur-device.html
If you decide to wait, then you can do that as well.