[Q] Installing Custom Rom over 4.3 topic

So I was getting sick of running CM 10.2 on my Galaxy SIII so I decided to go back to Verizon stock 4.1.2 rom and then before reading up on the 4.3 OTA update, I stupidly just went through the update. I didn't know how much of a hassle this was going to be, but basically I was wondering if anyone has any information on how to get off of this standard rom and back into the world of custom roms. Because I really really dislike touchwiz and really just about everything to do with this OTA update that I've had to deal with for the past pretty much month now. Any information will be helpful on steps I can take to get off of this ROM or if any work is being done to make this phone rock as much as it did when I first bought it.