I can't speak for the Malla, but the 18" GS and Kobra are pretty much tied as my favorite all-around blades for anything less than heavy chopping. They're lightweight enough to be fast weapons and forward-weighted enough to be effective light choppers. And either will slip perfectly under the side straps of my backpack, which keeps it out of the way but easily accessible in the woods.
In my opinion the Hanuman compares most closely to my 21" Chitlangi in terms of balance and weight. Again, it's probably due in large part to the big handle and deep fullers found on both blades.
Edit: Keep in mind that when you get a Hanuman, it's like getting a Nepali Swiss-Army khuk. In addition to the karda and chakma, it comes with a chisel, awl, tweezers, tobacco/tinder pouch and button hook. You'd pretty much have to carry it in a pack because the scabbard is fairly wide.