My (limited) experience is that it's the diamond drill that breaks the bank, power wise. A normal drill with OV scanner will be fine with a basic coal-burning generator (you'll be cooking a lot of trees), or a single-block reactor with 1 uranium and 4 coolant (good for about two 64-block holes with an OV scanner, which will usually generate more U than you use). Takes longer, but very portable (and it's not like you have to stand there and watch it, so I don't really care if it takes a little longer).
hmm... He just released .17 with this note:
Many other mod blocks will maintain state now, but are non-interactable.
I wonder if it still crashes.
Yes, just tested it with buidcraft pipes, maybe in the next version.