If you're looking for an affordable range of USB Audio interfaces check out Focusrite's Scarlett range, I've got the Focusrite Scarlett Studio package which includes the Scarlett 2i2 USB Audio Interface, a Scarlett CM25 Condenser Mic, a pair of Scarlett Headphones, mounting hardware for the mic,and also downloadable Steinberg Cubase DAW software, and also Focusrite plugins too, pretty much all you need for a portable studio.