Personally, I would (and have) run an Aussie in the front. The cost differential is too large for the benefit, IMHO.
But, if I was going to run an selectable, it would be an OX or ARB. The ECTD is a limited slip that gets "more limited" when its on. Its never a spool. I had a Eaton ELocker in my front D60 and didnt like it. It was unreliable and I worried about breaking it after reading review and feedback online. I replaced it with a welded carrier.