> I have a Røde mounted SE X1 condenser microphone which picks up absolutely everything; couldn't use it without my GPU.

It's a common misconception that certain types of microphones are more sensitive to background noise. Truth is, even if a microphone is more sensitive, it still picks up foreground and background noise equally.

There are some caveats--you can reject background noise with the right polar pattern and mic placement, background noise might be buried in the microphone's self noise, and other minor quirks. But in general, changing microphones is not an effective way to eliminate background noise.