Currently Being ModeratedMay 25, 2013 11:50 PM (in response to wdebenedettojr)
... I understand I will be getting less speed when extending my range but it shouldn't go down that much.
It is possible. The connection speed can only decrease. Try to find a location for your Express that enables it to receive a stronger signal from the Extreme. The ideal location for extending your wireless network may not be in the living room, though that won't help if you need to connect wired devices to it. Wireless networking is a study in compromises.
Feel free to experiment with the firmware versions, but I have not observed any problems whatsoever using 7.6.3 on any AirPort model, so I think that may be a fruitless endeavour.