I use the M-Audio Oxygen8 for my laptop....I'm considering buying another larger controller for my PC setup. I used to have an Evolution MK (can't remember the model number), but I traded it for a digital sound card.
Nah it's not a dumb question because you're finding out what you need to know. The keyboard would plug into the USB and no MIDI connection is needed. Keep in mind that you also won't need an adapter cable for the keyboard because it will get its power from the USB in the computer. Not sure if you knew that or not but I figured if you didn't know you might want to.