I'll lend some input but first let me share some background so you'll have a gauge on how much credibility it might bring to your considerations:
I started producing professionally in 1972 using the technology of the era and evolved with the recording technology to an eventual transition to digital in 1996, when I first purchased Pro Tools. It's been a solid format for me so I've stayed with it, working the system with consoles, controllers, ITB, with and without Digi/Avid hardware.
In that time I've produced just about everything that can be recorded and produced in a studio environment. From full albums or various genres to single song sessions, from advertising jingles to VO narration, audio books, yoga instruction, guitar lessons, Foley & SFX, and even tap dancing lessons. When you're in the studio business you are in the business of booking sessions so it doesn't matter what the content is as long as it keep the power on.
Regarding digital recording: Like everything else chipset dependent, converters and I/O boxes have evolved extensively over the years. My evaluation is that the the on board, factory features of the mid price range systems sound very good. They're not uber-high end quality but they sound very good. But like cell phones, things have come a long, long way since the first one.
You've already done your home work on the tech specs of various DAW hardware options and have an understanding of what makes a system work, so what it really comes down to is your budget. You can spend a little or spend a lot. But unless you are working high end in a pro level studio with a full systems console, you'll never hear the difference between a lower and higher end system, especially in a home studio setup. Other than the artist and engineer talents & skills, much of what you do hear when listening to professionally recorded music is a result of the console, the room, and the mastering.
Six years ago I changed hardware to a non Avid/Digi on board DSP processed system and have been using a UA Apollo quad Thunderbolt with Pro Tools and mixing ITB. It sounds great, is fast, computer efficient, and a great sounding system. And I've always run my systems on a Mac. However, I also have some good mics. FWIW remember that any system will record whatever you send into it. So the better the source signal the better the recording. Good mics = good recordings. And a well treated room = a better recording. Also, it' helps greatly to have a good set of well tuned audio monitors so you can hear what you are recording without any artificial coloring of the playback.
I also find the plug in versions of the high end compressors and effects units to be just as effective so if you have the funds, don't be shy of purchasing some quality effects plug ins...you'll use the heck out of them and tend to shy away from the cheap or free ones.
So what does this all boil down to? Scarlett or Forssell converters, or something in between? Pro Tools or Cakewalk or something in between? They all accomplish the same thing in the end. The answer is; buy what your budget allows and get to creating.
BTW: If you have a UA Apollo hardware unit the UA DAW - LUNA - is free. And you can get a lot done with something as simple as an Apollo Twin.