It sounds like you probably don't need the Nucleus if you are happy with PC solution. One difference is that only the Nucleus and Nucleus+ support Control4 (and maybe other?) smart home software so if you've hooked up the rest of the house to that it could be useful. As we use C4 and didn't want the old mac pro running 24hrs it was an easy (if expensive) choice.

Chris

Lounge/Cinema, Trinnov, DSP8000XE, 4x 320.2 in-ceiling, M6 rear, 2x DSW.2
Roon Nucleus+ and 320.2 in-ceiling in many rooms (KEF in-ceiling in bathrooms)
Spare: DSP5000, 598, 562v2, 500Mk2, 518, 519, 504, 101B, M3, 861v4, 800 DVD, MS600, MC200