Sonar is really vary capable. it's my main turn to DAW.
no reason to test the grass if your workflow is working for you.
having any other DAW for a particular thing you might need that Sonar does not provide is an investment in money, time and effort. sometimes not really worth it.
I use Cubase 7.5 for 1-2 things really and am still trying to grasp it and it's workflow. workarounds or figuring out how to do it in sonar is sometimes more effective and timesaving than trying to figure out how Cubase works just to use that one feature.
DAWs are kinda like vst effects. many out there, some better than others, some are one trick ponies that do that one trick exceptionally well, but it doesn't mean you HAVE TO HAVE it.
Use what works for ya and if your having fun, doesn't really matter what tool you use.