I would look at Black Lion Audio for affordable, excellent-sounding pro studio level mic pres. They have a Neve clone, an API one, and then the Auteur which is a more "transparent" all-rounder (but leans more "American" than "British").
Sure, the mic pres in wallet-friendly audio interfaces like Scarlett can be "fine", but are usually just "meh". Getting a quality mic pre in your set up makes a world of difference. Mic Pres – Black Lion Audio
Sure, the mic pres in wallet-friendly audio interfaces like Scarlett can be "fine", but are usually just "meh". Getting a quality mic pre in your set up makes a world of difference. Mic Pres – Black Lion Audio