I think the main benefit you can make is avoiding congestion by choosing a channel that your neighbours are not using.
In my experience, my routers have always been rubbish at doing that ‘automatically’.
I use a program called ‘Network Stumbler’ to sniff out the channels that all my neighbours are using and choose a different channel for myself.
The maximum data-rate being supplied to the Kefs is a 192/24 signal, which equates to just over 4.6 Mbit/sec. so… any Wireless-N or faster router should be able to deal with this data-rate.
I have LS50W running wirelessly on a bog-standard Wireless-N VirginMedia Router and I’m running at 2.4GHz!!!
The router is within a metre of my Kefs though and I’ve chosen a high channel number that is well away from what my neighbours are using.
I can stream 192/24 all day long.
It’s all a bit trial-and-error though and I’m probably having a bit of luck.
Just thought I’d share. 