I moved your post into it's own thread. We don't allow questions in the lounge. Thanks.
It depends. If you have a Tx that can hook up to it such as spektrum or futaba, then you can just get the one with teh cable.
The interlink is okay. But I prefer to use my own Tx since that is what I"m going to be flying on. If I use my DX8 in the field, wouldn't it be logical to use it on the sim so that I have the same feel? ,