I have used Sonar since version 8 and about year ago I started transition to Reaper, by now I have fully left Sonar and I have absolutely no urge to ever get back (one of them being my definite move from Windows to MacOS btw),
for me reliability and speed/swiftness is more important than feature set or fancy GUI, I had serious problems with AudioSnap in Sonar, bad stability in bigger projects, lack of any batch export functionality and many others, and I sincerely hate subscription-based online-managed licensing in general (it severely interferes with my opinion that serious studio workstation shall have no internet access and therefore be fully offline-operable)
so you should thoroughly evaluate pros and cons of those both DAWs regarding your workflow,
for ex. if you like the additional "eyecandy" plugins and instruments, you might as well buy those separately and use them in Reaper,
talking about plugins, I can honestly recommend Fabfilter Total Bundle, although it's just a small bunch of plugins, you can achieve practically everything with them