Plenty of audio professionals have separate audio interfaces and microphones. The iRig Stream Mic USB is a microphone and audio interface that gives you the best of both worlds. It has a studio-quality cardioid microphone and 16-bit, 48 kHz audio interface that you can use with your Windows or Mac computer.
The iRig Stream Mic USB has a 3.5mm stereo input for keyboards, mixers, and drum machines. It has a Loopback function for adding background music and audio from your computer. This audio interface has LED level indicators. You can find out more about it here.