Good plan - with a few comments. For sure the Hayabusa shock is a good move. Make sure you grease all the linkage, etc. when installing it. Check some other posts because I can't say for sure if it will bolt right in to a 1G, nor what it will do to ride height. I have a 2G B12 and just installed the Racetech .95 springs with 10WT oil - I weigh 165 lbs - I set the sag to 30MM and it feels a bit firm - have heard in other posts that Racetech recommends a higher rate spring as they intend for you to install their emulators (which will help with harshness). I have not installed the emulators yet. You may want to think about going to a lighter spring (0.90) or just put the extra $150 in for the emulators and do it all at once. Can't speak to the brace, but have heard it makes a noticable difference. Depending on what you have for tires now, the new ones will make a real improvement.
Jay