Similar experience, but I don't do it because it's something I couldn't buy. For me, there's a satisfaction about building your own. Also, I don't like to waste money and DIY can be much cheaper. And I respect certain independent speaker designers because they focus on what's audible over what's saleable. My secondary system has DIY Linkwitz LXMinis with a chain of Amazon Music HD via Alexa (or FLAC on MusicBee cast wirelessly from a laptop) > DTS Play-Fi > Paradigm PW Link > MiniDSP 2x4 HD > AIYIMA A07 amps > LXMinis. When using Alexa, which I do 95% of the time, the system is completely voice-controlled. Even turning it on is voice-controlled, so I literally never have to touch anything. I even wrapped 12 gauge OFC speaker cable in braided sleeves.
The MiniDSP had the PEQs pre-programmed for this setup. The LXMinis are accurate when measured with REW, and they hit all the attributes when listening to the Chesky Ultimate Demonstration Disc, but I've always thought they could use more bass, which isn't going to happen because, besides a subwoofer or two, it would require a new $500 MiniDSP and new PEQ programming. And since this is a secondary system, I don't want to spend the money. Overall, this system cost less than $1,500, including the laptop and Echo.
My future primary system is partially built (lacks cosmetics and a suitable place to place them for now) and consists of DIY BFM Davids. They have been tested with vintage amps being fed by a SMSL Sanskrit 10th Mk II DAC sourced by my phone. If you consider my vintage Pioneer SA-8800 into the cost, this system cost less than $2,000. About the same as just one of my HT subwoofers cost new.
Since you've decided to stick with the Real-Tek, I suspect you've read the Tom's Hardware DAC test, which would give you comfort in your selection. I decided to go with the SMSL just to get the best measurements for the best value.
However, I would dissuade inexperienced DIYers from this endeavor if their goal is to save money because after they buy all the tools, supplies and whatnot, they likely won't. And it's very likely they'll screw up something, which will cost even more money.