Pretty much, most of the touchwiz based custom ROMs allow you to customize the notification bar by using mods. The one suggested by SUroot is one of them. You can also flash Omega or crDroid. As of now, I am using the latter. By the way, whether you want to root or not it's up to you, personally a wouldn't enjoy the phone without root, the decision is yours.
The above refers to the I9300.