Thanks all for the comments =)
Hashut's Blessing - yup, in the process of the Khazad Guard at the moment, though not to the same standard as Etako, they all six need to be finished fairly quickly for a game coming up!
Queen Beruthiel and Shadowmaster26 - I really value input on this one!
I figured that because it was in close combat only I'll ever only really hit the guy in front of Etako and knock him into the guy behind. Not sure how that's really different to using a throwing axe on the guy in front then attacking the guy behind him, except that with the throwing axe option I would then get two attacks at strength 4 on the guy behind instead of one at 3.
The only time the fist attack would be better is if there were a whole line of guys one after the other, but in that case Balin would still be more likely to kill because the front guy would be trapped in that case, causing double wound rolls (each with his +1). Balin is just a killing machine with Durin's axe! I mean, he gets his throwing axe, then he gets three rolls to see who wins a fight, followed by two attacks, each with a +1 to wound!
I agree that if the fist had multiple attacks you could knock a big hole in a wall, but with just the one attack I'm not sure, unless I'm missing something obvious (highly likely!).
After typing up the rules, my initial thought was that I was wasting points on something just to be able to write in the battle report that a guy went flying through the air while gimping the awesome combat skills of just using Balin, to the point where I thought I might just use Balin's rules anyway.
Would love suggestions!
Oh, and speaking of Khazad Guard =P
Blog has tons more photos of WIP shots, group shots with just the Khazad and another couple angles of the combined group shot.