I've just found this machine for sale. The model number is Md771bz/a and they are still charging full price. I should buy a SSD and a new GPU (GTX 780) to make it more up to date, so it's gonna cost a little more. Should i go with this one or stick with the new MacPros that will be arriving? Referring to this new one, i intend to go with the base U$4.000,00 version (6 core and d500). My main worry is future-proofing, since i intend to stay a long time with this computer and, if possible, upgrade my GPU when i feel necessary.