We have many threads on brakes. I see you've read many of them, so you're ahead of the game. See the Sumitomo info, below.
Here's one view: if you have the OEM 1993-2007 front brakes (2 pairs opposed piston calipers), and you use DOT 4, braided stainless steel brake lines, with your 5/8" OEM master cyl., and HH rated friction pads, with OEM 298 mm rotors in good shape, that's the standard.
Sean Morley
[email protected] sells a Suzuki 6-piston caliper, large dia. rotor single-sided brake for the front, and people who use it like it. That's probably the least expensive upgrade I know of.
Sean's opinion is that there isn't a difference in the OEM 1993-2007 calipers and the early blue or gold-colored plugs Yamaha R1/R6 4-piston calipers, in terms of braking function.
Sumitomo 6-piston calipers, as used on the last of the FZR1000, and then the YZF1000 bikes, is another popular choice. No adapter needed, a direct bolt-on for 1993-2007 Vmaxes.
https://www.vmaxforum.net/threads/caliper-piston-material-what-is-it.40004/#post-517472
Homework for you:
https://www.vmaxforum.net/threads/17mm-bore-for-master-cylinder.42709/#post-443298
Brake modification Sumitomo 6-pot use info
A post by Sean Morley, lots of data and pics:
What did you do to your Vmax today? Part 2
Much discussion on this thread:
Brake calipers upgrade