I have the Presonus Audiobox 1818 VSL, and it works well with Sonar.
I looked up the specs for your Propellerhead Balance, and it seems like they have ASIO drivers for Windows 7 and 8, and it claims in multiple places that it works with any DAW software.
If you have that device still, can you please elaborate on the issues you were having with it and Sonar? Perhaps the issues can be resolved, saving you from having to buy an additional interface.
Bob Bone