Brushless Recomendation...New to R/C

Great advice guys! I can't thank you enough for the input. I did fail to mention that I do have the steel CVD's already. Is the consensus for the steel idler gear in the tranny? In addition, I was planning to upgrade when parts went tits up while driving. I don’t plan on racing, rather just tear around in the dirt with buddies, so I will research the setups you suggested and implement them this winter. Any more suggestions?