Having the right bow in your hand builds confidence! When that final moment comes...two things come together...your practice and your confidence. You need BOTH. I'll take those over luck any day.
You also need a brand you can count on. One that has exemplary customer service, that can turn that bow or part around in a couple of days, NOT a couple of weeks, and one that is not plagued with limb problems, riser problems, or pulley designs that shear cables.
In other words...DO YOUR DUE DILIGENCE.
Get on archerytalk.com and hear first hand what bows have what problems, then pick two or three of the best a shoot them. At this step they can all be made to shoot quieter by many means, so just consider which one you shoot the best.
Remember....CONFIDENCE, and PRACTICE are key.
Shoot what you shoot best...
Also, when you shoot bows at dealers, have them set up the bow for your draw length, and have the peep and sight set for you. Then spend a little time getting used to each.
One thing is for sure...when Magilla walks under my tree, I want my thoughts to be, "you are dead meat" NOT " I hope I don't blow this shot"