Build server recommendations

[RSM72]

I'd probably go for a dual SSD build and have the SSDs Raid-1 mirrored for reliability. Probably 2x SSD for system and 2x HDD for your sourcecode depending on the size. Move most stuff to a rack mounted 12-bay NAS (even if you dont use all bays in the beginning) for archival. If you can afford and your network supports it go 10G instead of 1G.

8-core Xeon and 32GB of memory is good to go.

Go with a customized build by a vendor (eg. Dell or HP) instead of building the server on your own, put a care pack on it for 3 years just for 24x7 protection and replacement of failed hardware.