I use the davide BVC from Anyvape and a Kanger protank 2. Both with original atomizers. Should be at least acceptable quality. Never really had a problem with them, it the mods that's been a downer.
The most durable and reliable regulated setup for those toppers is a Provari, in my experience. They are often here on the ECF classifieds for as little as $50 used, and have a high grade connector that I cannot wear out. The bevel on the top cap makes them a good fit for your toppers as well. I'm using a three year old one right now that has seen major abuse, yet it performs as new. Good luck with your next mod!