The 18 inch ang khola that I have seems to be as invincible as the legends say, powerful, easy to swing, easy to keep sharp.
I only have one, and I don't know anyone else who has one, so I can't give any kind of mass opinion, sorry. you might want to ask around at Bladeforums.com
I like mine A LOT, at least since I removed the brass point from the sheath.
If you decide to get one, I CAN say that Himalayan Imports treated me very well, fast service, answered my questions promptly, and the price is good (less than Cold Steel, and it's kind of neat that they are handmade halfway across the world)
The super mirror finish will scuff with use, it isn't magic metal or anything, but be prepared to hack and chop and hack and chop, holding the khukuri seems to inspire destruction of wood, dead shrubbery, tree limbs, and many things that don't necessarily NEED to be hacked and chopped, but it is just sooo much fun to do and hard to resist. Even wet wood will fall to a good blade.