Sound card upgrade advice?

I just pulled the trigger on these speakers—the Klipsch Reference Series
Unlike the Z623, these actually feature a digital input.

So, here’s my setup: I'm running an A88XM-E35 motherboard https://www.msi.com/Motherboard/A88XM-E35/Specification with a chipset integrated by Intel® High Definition Audio
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I’m a bit out of my element here—do you think the onboard audio is going to bottleneck the sound quality on these speakers? Since there's no digital output available, I'm worried.

Would it be worth upgrading my sound card? Also, since I really don't feel like tearing apart my PC right now, would this one be a decent choice?

I don't really play games much; I mostly just need something for music, YouTube, and stuff like that.
It feels a bit overpriced $167 for even the cheapest Creative Sound Blaster. Look, I'm not exactly an expert here—I've been doing some Googling—but I can't tell if the Asus Xonar DG or the DGX would be the better way to go. I might be able to pick one up used for around 170-$93

I don't think you'll lose much here. It’s not exactly a high-end setup, and the onboard audio on your motherboard probably isn't absolute garbage.

You could always look into some USB DACs with RCA or 3.5mm outputs—though good luck finding one that isn't overpriced junk.

Honestly, I’m starting to have second thoughts, and I can't help but wonder if I made a mistake here. I'm worried I picked up speakers that are way too focused on gaming and movies, which might be why they get such high marks.
I'm wondering if I should have just gone with the PreSonus Eris 3.5 instead—since most of my listening is music-focused, and not the kind of pop stuff kids are into these days.

I really value clean, pure sound, so now I'm sitting here questioning if buying these Klipsch Reference Series was a blunder (even though I haven't even picked them up yet). It’s a shame that you can't find a direct comparison on YouTube like this one, where you see how the Klipsch Reference Series stacks up against others that cost three times as much.
To give you some context, I’ve been rocking these old Klipsch speakers that someone handed down to me used maybe 10 or 15 years ago—and before me, someone else had them as hand-me-downs from a decade prior. 😁 So, we're talking 20-year-old gear that's definitely seen better days.
And man, they were just these tiny little satellites paired with a sub. I'm slightly concerned that the Logitech setup might actually be a step down from those, aside from the bass—though, let's be real, the bass is fine for gaming, and it's not like I'm going to be blasting heavy bass tracks all day long. I'm not a kid, after all.

If you didn't pick it up in person, you probably bought it online, which means you've got a 14-day window to return it. Honestly, I wouldn't look at Logitech if you actually care about music, though maybe they're fine for some people.

I finally picked up my gear—someone else actually handled the delivery for me, which arrived late Saturday night. I've been messing around with various EQ presets to try and fix the sound, but honestly, nothing is working; I just can't get them to sound right given my current setup.

Now I'm stuck choosing between the iLoud Micro, the PreSonus Eris 3.5, and the PreSonus Eris 4.5.

Regarding the PreSonus Eris 4.5, I have some concerns—unless I raise them up to fit horizontally on my desk, I tend to sit pretty close to my monitors. I usually hover about 28 inches from each speaker, so I'm worried they won't sound great at such a tight listening distance.

As for the iLoud Micro, my fear is that the soundstage won't fill out the room properly; it's not a tiny space, probably at least 15x10 feet, so I'm worried the audio will only feel "good" if I'm sitting right on top of them.

In terms of sheer volume, I assume they're all roughly similar, but since I occasionally want to crank things up, I’d lean toward the KoPros—they seem more durable and offer a richer, more pleasant tone. I'll likely keep both sets in a horizontal orientation.