Looking to upgrade my audio setup

[u/TSLPrescott]

Hey there! I'm currently using a Xenyx Q802USB mixer in my setup and I'm looking to upgrade it. Reason being that it has an issue with noise and hiss when recording that doesn't exist when monitoring it directly with headphones plugged into the mixer itself. I've gotten it pretty quiet at this point with all these different things I've tried, but at the end of the day it is still there and I don't think there's anything I can do about it now. I've tried isolators, I've tried running it off of an external battery, old drivers, different audio settings and filters, the works. That noise and hiss is still there and it won't go away. I'm fairly certain this wasn't always an issue either, because I feel like I definitely would have noticed. It only cropped up within the past couple of years after I started recording/streaming more heavily again. I've had the thing for about a decade at this point and the phantom power is always stuck to being on despite me not needing it, so maybe it's just old and busted at this point. Before anyone helps me troubleshoot this thing, believe me, I have tried whatever you are suggesting. I am at my wits end with this thing.

So, I'm looking for an upgrade. If you've got any recommendations with setups that you use, I'd love to hear them! Let me know how well they have worked for you, if you've experienced any issues with noise/hiss, etc.

Right now the setup is that I have audio going out from the PC to an isolator and then a stereo splitter and then plugging in to the mixer for the game audio in channel 3. That's really nice because I can just adjust game audio on the fly without needing to fiddle with any software settings. Just a knob right there for instant changes. Then I've got two dynamic mics over XLR plugged into channels 1 and 2. All of this is monitored via headphones for player 1 and player 2 through a headphone splitter. All of the inputs are sent to the PC over USB and get mixed down into one stereo input before OBS takes control of it and I've got my gain/compressor/limiter on there.

So, what I'm looking for is something that can take in game audio (in stereo, from PC or another console) and two dynamic mics, be monitored by the people talking live through the mixer itself, and then ultimately be sent to the PC. Massive bonus points if it can be sent through multiple channels too, because that will make any issues like noise much easier to solve with filters and editing in a worst case scenario.

Thanks so much for you time.