Front end, there's no clear "best" suspension. There are a few front options:
Traxxion Dynamics - $1100
Maxton - $1300 ish
There are one or two cartridge conversions I'm forgetting, Ohlins makes nothing.
Rear end there's pretty much two top choices:
Wilber's 642s or Ohlins HD that you adapt- both range 1400-1800 depending on options.
Tires - Too many opinions, there's no clear "best". To speed handling go Avon 140/75 front with any 240/50 to speed it a bit more, go with the 240/55 Exedra Max.
If you go Wilber's or Ohlins rears get them a bit longer than stock to vastly improve cornering.
Next step is the wheels as mentioned, $3600 shipped from the U.K. Pilot Power 3 240/40R18 or Dunlop Q3 240, stickiest tires made in that size.
Then your going to hit the "need a steering damper" point. Two choices, custom design and install a damper or get skilled at riding a "widowmaker".
Past that start looking at the things I've done, cut unsprung weight by replacing panels with carbon or fiberglass, replace stock steel bolts and nuts with titanium and aluminum fasteners. There's about 35lb to be saved doing this.
Next step is Custom parts:
Custom Aluminum swing arm
Custom Triple Trees to adjust geometry
Custom made Aluminum everything to replace steel to save weight
A max effort $100k rocket could easily get down in the high 500lb range, 580-590.
It would be cheaper and easier to start with a custom Aluminum box frame and design your own bike from the get go though.