I vaguely remember something like this being possible, but I just read through the online help and I couldn't find it.

Is it possible to configure SONAR so that when I click on the RECORD-ENABLE button on a track, it is considered exclusive and de-selects any previously enabled track?

Kind of a one-click solution to change which track is enabled for record.

Or am I crazy? 

You could click the global record enable a time or two to get all tracks disabled and then click your one track. That's like a 3 click solution.

I can see how this could be of great benefit when recording.

We already have Exclusive Solo, so implementing an Exclusive Arming function shouldn't be too difficult.

If you haven't already done  so, fill in a feature request:

http://www.cakewalk.com/s...ct/featurerequest.aspx

Thanks guys. Enhancement request submitted.