The Infinite Black Copper Stingray clone has been good to me. Copper gives less voltage drop, but it's a softer metal. I did wind up messing up the threading a bit on the large tube that came with it. I can only use 18490's as my largest battery now.
The Hcigar Nemesis clone seems to be a bit sturdier. Well, more then seems to be, as it's still functional and my husband has been using it. He has a habit of falling asleep on the couch and forgetting his mod is on his lap. He'll get up, and it would go flying. So far, the longest lasting mods in his destructive hands has been the stainless steel Nemesis clone and the Provari.
For the dripper, I'm quite pleased with my Tobh clone. Hits hard and doesn't get too hot with the heat sinking fins on top. Easy dual coil build as well. Got it right on my first attempt! Great flavor times 20, and huge, thick, almost creamy clouds. I can see why the large clouds has a certain appeal, but I'm mostly a flavor junkie, rather then a cloud chaser.
Kayfuns are flavor makers, and Ehpro makes the best clones I think. Get the Kayfun Lite by Ehpro as your out and about option, if you don't care to drip while out.
For batteries and chargers, don't go cheap. A good charger isn't all that expensive anyway, so there's no reason to go cheap. I got the Nitecore i2, a well regarded charger, for around $14. Until recently, I've exclusively used AW IMR batteries, which are some well regarded batteries with some pretty safe chemistry. I do have a Sony VTC4 on the way though. Sony VTC5 would be even better for sub ohming. Watch for clones on the batteries. The AW IMR batteries have the hologram stickers now, rather the the black and silver ones. Most of the cloned batteries will have the black and silver.
Get an ohm meter and a voltage meter to check resistance of your coils and the remaining life/voltage of your batteries. Always test before firing. Pbusardo has a battery info page on his site tasteyourjuice.com, which will tell you the max amps of several of the most popular batteries. Google ohms law calculator, plug in the resistance (ohms) of your coils, and the voltage your battery is putting out, and the calculator will tell you the amps the whole set up is using. Check to make sure you are within the safe range for the brand and size of your battery, and you should be perfectly fine!