I have a home network of two quad-core PCs and one 27" iMac (2011), plus a bunch of media devices. Everything is hardwired with cat6, except for my iPhone and iPad. The router connects to 2 switches, which fee the multiple devices. I have to use a poor quality 2Wire box with my internet provider (until they install fibre optic next year). The transfer speed between the iMac and the PCs was absolutely brutal. I was told it was because of the 2Wire box. Therefore, I put a D-Link in front of it, and networked everything to that, with the 2Wire only providing internet. This is much better, performance wise, but I still have a lot of trouble connecting the iMac to one of the PCs. Sometimes it's fine, sometimes it can access every drive but one, sometimes it can't see any drives, even though the other pc can access them. I just ordered a used Mac Pro quad-core (2009) to replace the smaller pc (the file/media server). I'm guessing this is likely overkill, but I like overkilling I'm hoping for a bit more stability and performance. Now, my questions... What if I replaced the D-Link router with an Airport Express? 1) First of all, would it work in that scenario, as it would be networking with two 5 port switches? 2) Can it be configured for this type of thing? 3) Would I be likely to see any stability improvements? 4) Would I see any speed improvements? 5) Is the Airport Extreme intended for use in wired networks? My assumption was that it should work fine hardwired, as well as wirelessly to iPhone and iPad, plus have added performance with any new 802.11ac devices I purchase in the future. 6) Does this make any sense, or would you just leave the D-Link there? Thanks for any opinions.