Would have been better with an audio test of singing and acoustic guitar. But good review nonetheless.

Seems like a steal for 488RM especially with the pattern selections.

I noticed something though. On both the tests there seems to be a background hum, louder using the internet ASUS mic, not as loud using the Blue Yeti but still audible. I hope it's not the hum from your recording setup, but the hum of the airconditioner on the background.

Did you use the Blue Yeti for the voice over? Or some other mic?

Noise reduction on Audition should suffice, but sometimes this process takes some of the audio quality away.

It seems that your mics are picking up background noise, and like I mentioned, it sounds like your AC. Try doing a test with your AC turned off to see if this is the problem.