Electric, welcome to the Cantina! This question has been asked a few dozen times before, and everyone has an opinion, but it wouldn't hurt to do some searching, see some pics and read some opinions.
Personally for the tasks you describe I would probably go with something that is strong enough to do a good amount of work but also light enough to use for your martial arts. I don't think I would personally pick the ones you did, at least for the martial arts aspects, but would probably go with an 18" Chitlangi, or perhaps Chainpuri.
They are stronger than a Kobra for MA work, the chit has beautiful fullers, and yet it would be heavy enough for a lot of work.
Other than that a good choice would be a standard 17" 24 oz. Foxes Folly, sometimes called the FF fighter. I think that would fill the bill pretty nicely, although the consensus seems to be for heavy work it could have been just a tad (3-4 oz.) heavier. It is an excellent design and good knife however, and could easily do light work and still be a fearsome MA blade.
I think those fit the bill pretty well for what you want. An 18" sirupate would be a good choice, but it doesn't look quite as racy as the others, as it has no fullers, at least IMO.
Finally, the M43 was designed to do just about all you are asking for, and looks great besides. Do a search to see some pics. Look for all threads by
Bwray and you'll see a thread he just posted with pics of his Bura M43. You may really like the looks of that model!
The ones you listed are excellent choppers, but these others might work better for your described combination use, although I have to say the 15" BAS is a great first choice for an all-round knife. I just don't think of the WWII and AK as MA models.
BTW, the chiruwa riveted handles as found on the Chiruwa AK, M43 and others, are super strong, but will transmit just a bit more to your hand, and some people don't care for that.
Finally, you can contact Yangdu as to a particular model and buy direct, pay a bit more and choose from the web site, or look for the great daily deals here that happen most weekdays and try to snag one of those. In any case, emailing Yangdu directly at
Himimp@aol.com will get you all the info you need.
Good luck and let us know what you come up with please!
Regards,
Norm