My current setup is:
Foobar (WASAPI) -> Modi -> Magni -> Mad Dogs
I only have low volume problems on relatively quiet music (the version of Adele - Skyfall which I have is one example - maxing the Magni, the volume is still ridiculously low). For other music, I have to increase volume to 3-4 o'clock for the volume to be loud enough.
Actually, maxing out the Magni is essentially only uncomfortably loud when playing highly compressed modern music (ex. pop/dance)
If you are getting to 3-4 o-clock on the Magni then there is some other volume setting that is set low, because that should blow your pants off, even with "relatively quiet music". I suppose the recording could be ripped at an odd volume, or it could just be hearing damage =).