I no longer have a CD player in my system, as I just don't find myself listing to music much anymore (two kids in sport year round mean I'm always on the go), but I kept a modest dedicated CD Player in my system for a long time because it offered one thing over DVD, Blu-Ray, HD-DVD machines - speed. Input to the CD player was near instantaneous, while it seemed like inputs to the "video" players took forever. That might be one thing that you haven't thought of.
7.4.4 Theater Room: JVC-RS500, Silver Ticket AT 2.35:1 142”, Onkyo RZ830, Anthem PVA-7, Panasonic UB420, Apple TV 4K, JBL Studio 530’s, 4 - 15" DIY Sealed Subs
3.1 Living Room: Samsung 64” F8500 Plasma, Anthem MRX 300, Dynaudio Audience 52’s, Dynaudio Audience 122C, NHT SubOne, Roku Express (2019)