Basic NAD Vs. Bells/Whistles Marantz Int. Amp

Streaming only/musical tastes all over the map…light-to-non-existent on Classical and Rap, Heavier on Jazz, Rock and Pop.  Using Klipsch RP-600M speakers in an art studio/workshop environment that’s sort of “garage-like” except that it’s air conditioned when occupied…the resident lizards and occasional wasp and I are on first name basis, lol.  Using a new, eero mesh WiFi system there that’s working really well getting Tidal into an Airport Express > aging, Sherwood receiver presently.

Does a NAD C316 BEE V2 utilizing the existing Airport Express as streaming device — or — a Marantz PM7000N seem like the best integrated amp upgrade here?  To be honest, I like the Marantz but have concerns about the old “more stuff to break down” axiom (computer chip thingies/etc.) in tandem with the fact that it’s going to be used in a harsher than usual setting.  Am I worrying too much here?

Thanks in advance!