Hello all Apple Aficionados! I have a question for which I cannot find a answer. I have a large home with a wired and wireless network using an 5 yr. old airport base station that also serves as my router. I am getting the new airport Extreme base station MD031LL/A but also need to buy several newer airport Express units to boost the signal. I am trying to do it on the cheep by getting used express units but I can't find any information on what model will work best with this base station(obviously the new ones will) but i I want to go the used route. I think it is A1264 but I can find no technical info from Apple or dates when this model was released to confirm this. Help 
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