... Yeah the WWII Model definitely has caught my eye. I'm thinking I might just get a regular WW2 Model and then special order one with a full tang later after I've used it for a while....
The WWII model occasionally comes with chiruwa type handle, and they look great. Here's one that's a little bigger than most, 18.5" OAL, 33oz:
View attachment 426444
[Note: Any comparisons of length and weight for the various HI models have to be with the caveat that these blades are hand made with traditional tools and methods, so there is a lot of variation even within a particular model. Some kamis are known for making extra massive knives, but sometimes the same kami will produce a much lighter version. I suppose it can vary according to what the kami has for breakfast, or what piece of steel he starts with.]
The non-chiruwa WWII also looks great and arguably is a little more comfortable: less vibration when chopping, no metal in contact with your hand in cold weather, and less potential for protruding edges. As Shavru pointed out, the tang can't come out, since it goes all the way through the handle and is peened over at the end. Mostly it's a matter of which look appeals to you, and which type is available when you want the knife.
As for repairing a broken handle, that's been debated on this forum. Of course it depends on the nature of the break. Is the handle merely cracked, or is it destroyed? If you're in the field it's probably easier to make a quick, perhaps temporary repair on a chiruwa type handle, since you can wrap the wide tang in paracord. If you have access to some kind of shop, the non-chiruwa handle might be easier to replace, since you just have to drill a hole for the tang, fill it with epoxy and peen over the end. Either way, there's a lot of shaping involved to get the wood comfortable and looking good.
WWII versus M43 is a close call. The WWII tend to run a little lighter weight, which is a plus. They usually have a thick spine, thus plenty of strength. I'd say on the weapon-chopper spectrum, the WWII is a little closer to the weapon end, just because it's a little lighter. The M43 handle is closer to what most westerners are used to, as it doesn't have the ring around the middle, and it usually comes in chiruwa style.
Let us know what you end up with, preferably with pictures.