A decent priced z270 with good audio

im thinking of upgrading but im not sure about what my audio needs are. i have a behringer umc22 usb dac that is hooked up to my studio monitors and headphones. im not really sure what my needs are. will the audio channels still matter if i am using usb? does a better audio mobo generally mean there is better electrical separation all around?

my budget z68 has a bit of noticeable hiss but it is understandable considering how old it is and it being a bottom of the barrel mobo.

my only other needs are full speed m.2 for a 960 evo, rgb, and sli.
 
Solution
The ASUS Prime Z270-A https://www.asus.com/us/Motherboards/PRIME-Z270-A/ has a nice onboard audio driver. I've had great audio with my ASUS motherboards over the years. It has a pretty reasonable price tag around $160.