I'm pretty sure a lite version of Live will do what you want. You can then use ReWire to integrate Live itself Sonar.
 
However, don't forget that you can build up loops and scenes in the Matrix view, then capture the results as linear tracks in Track View. To create loops I'll often just mess around in the Matrix view and capture...then I find bits that I like in Track View, and Bounce to Track to create loops. It's a more improvisational approach with Sonar but it works well.