For what your doing Sonar is not the proper software. You should use a dedicated wave editor like the ones mentioned. Some are even free, but the more you pay the more tools your get. Wave lab even shares the plug ins with Sonar and Cubase. The basic version is all you need and it's only $100. Would be WAY faster
you will never loose anything recorded as it is streamed it is stored.
It can be set to automatically number and name the tracks.
As quick as your can hit "stop" and then "record" you get a new track running.
I have been recording live this way since 2004. I record music , speech , sermons, plays and funerals. Afterwards the editing is super fast.
Cut beginning and ends/ check peak level/ Normalize if needed/ Loudness Maximizer if needed/ analyze peak RMS level. Eq. rendering a track is about 5 seconds per minute of audio.
And the waveform view is excellent.
Sonar is excellent for making music. It is a multi track DAW.
If all you are working with is a mono or stereo wave or MP3 ( it will record any format live)
then look into a dedicated wave editor.