This is all subjective. Some people like smooth, warm FM sounding audio, while others prefer a crisp communications type response.
First of all, the internal small speakers mounted on top of radios are a compromise at best if you're concerned about RX audio. You're talking about "hi end static", so why did you boost treble above mid-point, and bass at mid-point? You should reduce treble, and increase bass to mitigate high end response. What kind of electrical household noise is affecting receive? Normal propagation band noise floor is a factor. Reduce RF gain. Use a larger speaker with a woofer driver. NR should help reduce the "noise", but will color the audio. There are many ways to get the audio you want, without buying a more expensive, feature-rich radio.
I've had all kinds of higher end radios in the past, and I find by adjusting the audio/filter controls on my 7300's to my liking and using an external speaker, they sound as good as any other radio I've owned. Again, a purely subjective topic. Like..."What kind of mic sounds better on my radio?" It depends on your individual voice characteristics, and what you're trying to achieve (sharp DX/contest audio or ragchew). When you ask..."How's my audio?", you'll get all kinds of answers, depending on what the other individual likes.