Thanks for that info. Somewhere I got the impression the Gen1 could do 5GHz but that it had to be either/or, either 2.4 or 5 but it could not do both simultaneously like the Extreme. Maybe a reason to update to the 2nd Gen, but not an urgent need if the current system I have provides us with what we need.The first generation Wireless N Express was limited to 2.4 GHz to my knowledge. 5 GHz "simultaneous dual band" wireless was added with the second generation Express. The Extreme has been 5 GHz capable since the 2009 3rd generation Extreme.
Thanks again for all your help and information.