Bargain dropper posts that don’t suck. If you are buying new this number from Chain Reaction is hard to beat. It’s also available in external version for less and 150mm one for more. After that, yeah the Fox Performance Transfer model is very nice. The above said, you can often find great deals on take off OEM stuff on eBay or Pinkbike. Party.
Love the Fox Transfer Performance model with a Wolf Tooth remote lever. I haven’t had it long enough to form an opinion on the durability, but all reports say its one of the best. Very easy to micro adjust while riding and I like the audible clunk when it returns to full extension. Very easy to set up and mine only has a couple degrees of movement side to side, which I never notice when riding.
The brand X post is a really solid option. It’s made by Trans X and then badged up under a few different brand names. It is a replaceable internal cartridge but I wouldn’t worry to much as it also has a 2 year warranty. Here’s a video of me installing one.