I don't have hands-on experience with most of these knives (except for a Mac Professional, which I have had for about 36 hours), but I'm presuming you've read the following threads (I'm posting them here, to bring everyone else up to speed)
In the first post, BDL discusses and compares the Masamoto and the Mac. BDL see the two as extremely similar, with the basic difference between the two as whether you want a stiffer blade (the Mac) or a more flexible blade (the Masamoto).
In the second post, BDL discusses the Kagayaki VG-10 and the Masamoto VG, their relative strengths and weaknesses. Not much I can add to that. From BDL's post, it seems the Masamoto VG would be the hands-down better knife. By inference, I suspect that BDL would be making the same judgement on Mac vs. Kagayaki - i.e., the Mac would be the "better" knife.
I will defer to BDL's experience here, rather than duplicate his earlier efforts.
However, I would point out that the knives are only part of the picture. You still need to realize that each and all of these knives will get dull through use. It will be up to you to slow down the dulling process and to have a way to bring the chosen knife back to sharpness.
To slow down the process, a good cutting board is essential. The best boards around, in terms of being edge-friendly, would be end-grain hardwood boards. Next best would be edge grain hardwood boards. Plastic would be much further down the list, as would be bamboo, composite boards, and the absolute nadir, stone (marble or granite) and glass.
You are also going to need some sort of sharpening system. Least expensive would be stones, though you will need to practice.
Check out the following post:
Chad Ward, the author, later expanded that post into book form, An Edge In The Kitchen. If you have a good public library system or access through the Interlibrary loan system, you can read the book for free, though you should keep in mind that the prices are considerably dated.
You might also look at the Edge Pro Apex. Chef Knives To Go sells custom kits, including the "Essentials" kit, which has 3 Shapton Glass mounted stones for $230. I use it and very much appreciate that kit.
Hope that helps.