Depends on what you need and what exactly the capabilities are.
Subwoofer integration requires some finesse to do perfectly, such as time delay and setting the slopes correctly.
All of that depends on measurements. If your amp has only basic settings, but Jriver gives you fine level control I'd go with JRiver. Plus, most subs can use at least a little EQ to tame a room mode or two. Minimize the number of tools you have doing that.