Have a few questions. topic

I've been wanting to root my phone because I have Tasker And TiBa pro. The last two S3s I've had hard bricked so I'm hesitant to attempt to root again. I've been looking around and saw somewhere that the boot loader can't be unlocked on 4.3, and I was wondering if I could still root my phone. Considering they did not brick until I rebooted once, I think I might be able to but want confirmation before I attempt it again. Also, since I will just have root with an unlocked boot loader I won't be able to flash CWM or custom ROMs, right? Not even via mobile Odin? Thinks that's all I have to ask right now, thanks for your help in advance!

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