Hi Sasha,

You may also want to look at the CEntrance MicPort Pro USB mic preamp, which offers 24/96 audio and 48V phantom power. This is what BBC field reporters use. Whilst it costs a bit more than other portable USB mic preamps, it sounds as good as much more expensive analogue preamps, from my experience. Here is a link to more information:

CEntrance, Inc. / Products / MicPort Pro

Best of luck on your project.