I'd actually trust one of the labs I've used for nearly 30 years, we have a more than good relationship as we used to do their B&W printing while they were getting established. The owner was once a Durst technician, he's 110% quality images, if he uses a non optical route then it's the best.
Here isn't the place to discuss this, personally I don't discuss digital aspect but it's a reality that we live with. I just use what gives good results.
Well, I printed Ektar 100 on RA4 by myself, but then I have a colour head on my enlarger and Unicolor tubes...
If you're serious about colour printing, it could be worth investing in a colour head. I got my Vivitar VI with dioptic colour head, and lens for 100$. Canadian Dollars!
Using film since before it was hip.
"One of the most singular characters of the hyposulphites, is the property their solutions possess of dissolving muriate of silver and retaining it in considerable quantity in permanent solution" — Sir John Frederick William Herschel, "On the Hyposulphurous Acid and its Compounds." The Edinburgh Philosophical Journal, Vol. 1 (8 Jan. 1819): 8-29. p. 11