I am looking to get a new Windows PC for DIY home music recording
A good external DAC with the relevant inputs for microphones and electrical pickups (if needed) should yield better results, but a cheap $20 mic hardly justifies a $2,000 DAC.
The Realtek DACs (codecs) on the motherboard are OK for general purpose work, but they're not quite up to serious studio work.
A huge amount depends on how demanding you are about audio quality and more importantly, on your budget. If you cannot hear the difference and you're not selling your work, there's no need to buy expensive kit.
You can start off with the built-in mobo DAC, then graduate to an external DAC as you become more proficient. Balanced inputs are a bonus, but usually cost more and may not be necessary.
https://soundrating.com/home-audio-accessories/digital-to-analog-converters-dac/
For general purpose computer audio playback I use an old Cambridge Audio DAC Magic 100, linked to four PCs via a USB KVM switch.
https://www.cambridgeaudio.com/usa/en/products/hi-fi/dacmagic/dacmagic100
For more critical work I use a Sennheiser HDV 820 DAC amp with balanced headphone output to drive a pair of Sennheiser HD 820 closed-back phones.
https://www.headphonesty.com/2019/05/balanced-vs-unbalanced-audio-connections/
https://www.sennheiser-hearing.com/en-US/p/hdv-820/
https://www.sennheiser-hearing.com/en-US/p/hd-820/
I thought long and hard before squandering my money on the Sennheiser combination plus an Astell & Kern SR35 DAP, but my listening experience has improved. I could've bought a new PC instead, but the next build isn't due until mid 2026.
https://www.astellnkern.com/product/product_detail.jsp?productNo=143
The speakers in my computer room are prehistoric Goodmans Magnums coupled to a Kenwood tuner amp. Not HiFi, but the 12in woofers can shift some air.
https://www.radiomuseum.org/r/goodmans_magnum.html
Some chipsets offer 4-channel, 5.1 and 7.1 audio.
Before you start worrying about creating sophisticated multi-channel audio, start off with 2-channel stereo. You can investigate surround sound encoding at a later date.
Whatever you buy, don't worry. Just enjoy the vibes.
https://ehomerecordingstudio.com/home-recording-studio-essentials/