Yeah you'd want those two harnesses, you should ask if it comes with the laptop cable too, otherwise you wont be able to tune it or anything, then you'll have to try to buy that cable from somewhere or have to buy the profec E-01
Bloody hell the greddy site is down at the moment, but it has some good info on both the e-manage and the profec e-01, my understanding is that the e-manage + E-01 does the same as PowerFC + AVCR but thr profec has a much larger screen and more features and can control the e-manage much easier and better that the poerfc is with a hand controler, but then again that is just what i have read here, so....?