I got s similar rig for 890 quid , free shipping
Z620,2xe5-2670,96g,nvs 315,1tb sata,win 7 . I did buy a more complete set because I dint want to work much to use it
so I removed the nvs and sata and added a gf970 and a ssd 256, 3tb sata (all from my old rig) , the free update from win 7 to win 10 was fine too
I dont do anything with cad or modelling I just got this rig because I liked the case and hp engerneering
I like the idea to have 32 logical cores despite I dont need them