RTAK II -
I chose the RTAK II for my large blade knife. Excellent quality, full tang, well balanced (just slighly forward of the chimping), comfortable and durable. Sheath is adequate but I prefer kydex. But don't let that stop you if you like the RTAK II.

Kershaw outcast -The thing I didn't like the kershaw outcast is it is not a full tang knife. It is glass filled nylon. So I'm not sure how well it will hold up in artic temperatures for my region of the country. It has good reviews but I didn't want to find out when I really need a knife at -25F.

Kukuri - are great as a chopping tool, but I think they would be a bit cumbersom dressing game or batonning logs due to the bent blade. Very capable knife and adequate. But the design is not real close to the becker brute. Some similiarities without the angle.

If you don't mind a little smaller knife (IE 7.5" blade) the cold steel recon scout is an excellent choice. 1/4" steel, heavy and very durable and good quality.

The RAT 7 (6.5" blade) is a little lighter but similar in quality and design of the RTAK II. Very capable high quality survival knife.

KBAR camp knife - looks pretty close to the becker brute but I prefer flat ground knives for survival purposes.