If I was going to get an auto loading 30-06 it would be a M1 Garand. Oh wait a minute, I did! And yes it was a MI Garand!
The 74 and the BAR are nice guns designed for hunting, and for that role they work good enough for walking through the woods or sitting in a stand making a couple of shots on deer during the season. I seriously doubt though they could take much in the way of punishment though from sustained use and firing long stings of shots before breaking and or over heating. The 6mm 74 my Dad has is great for a few shots out hunting and is pretty mild on the recoil as a result of the design, but I think thats about as far as it goes before you puch it beyond its designed parameters and start to seriously abuse it. Thats just my opinion though...
Seriously get a Garand! It might need a few worn parts replaced but its a damn solid gun. If thats too heavy for you get a fiberglass/composite stock to shave about a pound off it. Yes they make 3 and 5 round modified enblocs for it to make it legal to hunt with, I have a few of them! They look a bit ghetto but they work and thats all that really counts.