1. I'd go this route. While two clients can talk directly to each other without an AP, it's not well supported. However, if the empeg's wireless adapter could reach the AP, then so could the laptop, so you'd be good there.
  2. I'm not sure what you're talking about in regards to toggling between client and AP modes. You mean on the empeg? You should be able to get a DHCP IP address regradless of where in your network you are, so you wouldn't need to toggle. The only difference between using a WAP11 in client mode and using a WET11 is that the WAP11 can support more devices than the single one that the WET11 can.
  3. It doesn't look like the BEFW11S4 can be a client. Of course, you could set it up the other way around. There's no reason the WAP11 couldn't be the client of the BEFW11S4.
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Bitt Faulk