New Machine

Right folks,  Have decided to have a machine built only for Substance painter  [ different machine from my Mcad machine ] the reasoning being,  Substance has diferent needs from Mcad  and am not a fan of "halfway house " compromise. hence the new machine.  Prelim specs are as follows  CPU  Threadripper Pro 3955 WX,  Cooling to be Noctua , Board Asus Pro WS WRX 80E Sage,  Main and secondary drives Intel 750 series, Psu Corsair HX 1200 i  Memory, 128 Gb Hyper X   [ did initially think about ECC ram but that extra expense is not warranted ].  Gpu Nvidia RTX 3090 [ if the builder can get one !! ]  Have always been an Intel guy so this will be my first machine using AMD  [ any thoughts ]  I could upgrade any / all components if needed ] as these specs are not set in stone yet .