STL, here's the thing about mics. Most of them are designed to be used at roughly a handwidth from your face. When you get into the 2-2.5 foot away range, you are going to introduce a significant amount of room echo even when using a Cardioid mic. The reason for this is that when a mic is close, the decibel level hitting the diaphragm is much higher which drowns out the volume of the echo from an untreated room. At 2-3 feet away, the decibel level of your voice hitting the mic is much lower which makes the room echo very much worse. So you want the mic as close as possible.
Now, that said there are microphones designed to do what you want to do, they just tend to be more expensive. You need a shotgun mic for any appreciable distance from target. A shotgun mic accepts sound from only a very narrow cone in front of it which kills room echo very effectively. Unfortunately shotgun mics are expensive.
You could go the Yeti route, I suppose, or other basic condensers but it's always best to get the mic up off your desk in order to avoid keyboard and desk bumping noise. The Yeti is not ideal for getting up off the desk because it requires proprietary mounts which are expensive.
My recommendation is to change your ideal setup. Pick up a proper articulating arm that will attach to your desk. This way you can move the mic around as needed. Bring it closer while recording, move it away when you don't need it. And go for an AT2020, Samson C01U, Shure SM58 or MXL990.
