Q: AirPort Extreme Upgrade?

Wi-Fi base stations: Extending the range of your wireless network by adding additional Wi-Fi base stations - Apple Suppo…

Would an ugrade to the latest generation AirPort Extreme improve the situation?

On average......you could expect the new AirPort Extreme to have perhaps 10-15% greater range than the old version, in addition to much higher speed capability. But.....every home is different, and you really cannot know how well a new AirPort will perform in your home until you try it out in your home.

Apple's 14 day return privilege might come in handy if the new AirPort does not perform up to your expectations.

If the old AirPort Extreme is still operating well, you do have the option of using it as an extender to provide more signal strength to the second floor if you find that the new Extreme does not provide the signal levels that you need upstairs.