JRiver Media Center vs. Amarra

With JRiver offering a mac option now, does anyone have experience comparing the two offerings? I am running a mac mini to classe via USB and am debating between either the JRiver or the Amarra option. Thanks in advance for your assistance!
With JRiver for Mac being in such early stages of beta testing I don't know that a comparison at this point would be viable. It might be best to wait for the full official release version to make such comparison.
If you use Amarra, the version you use is critical IME. I use an older version that beats everything I have tried.

Steve N.
Empirical Audio
Some PC users with the Beta ver of the Jriver are experiencing ramdom crashes. I know mac is another thing, but i would wait until they have fixed the bugs.
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