If you are getting any " hand shock" of lingering vibration in the bow, limb savers will help reduce this as well as quiet things down a bit. A good stabilizer will also help reduce noise/vibration, as well as provide a better balance to the bow to steady your aim.

Personally, if it were me and money were no object, I' d add the limbsavers, and try different weights/lengths of stabilizers to see what combo balanced MY bow best. Then I' d get a Stealth...

Assuming the bow is well tuned, accuracy is ALL about repeatability. Practice makes near perfect. You need to shoot and shoot that bow for a good couple hundred shots to set the string and cables (they' ll most likely stretch a bit) then take it back to your pro to fine tune it back up.

Shoot lots of arrows, get proficient out to the distance you are comfortable shooting, and have a blast. As far as broadheads, depends entirely on your set up, arrows/fletch combo and quality, and tune job. There' s lots of good ones. However, this late in the game, I' d go with something proven to fly like field tips, say the Wasp Boss Bullet or Slick Tricks. If you want to use mechanicals, Rocket Steel heads would be a good choice, depending on your KE levels.

Good luck, and stay within your comfort zone. Remember, in the woods the targets are live...