This will not even register in your search radar, but as someone has mentioned the Trans-Fi Terminator should be on your list.
Look at the manifold, an inverted ‘v’ as opposed to a circular tube in most other cases. It is an inherently more stable ( no tendency to roll ) platform for the cartridge / wand assembly to glide on. It is low pressure / high flow operating as low as 0.5 psi ( I run it at 1.25 psi ), which can easily accommodate surge tanks for elevated SQ and aquarium type compressors are more than adequate. And the value proposition is out of this world.
Please review discussion of this arm on another thread : 2019 update Trans - Fi Terminator. You will find users of other ‘higher caliber ‘ arms, LT or otherwise, moving to the Terminator. Most recently a Clearaudio TT5 user taking up the Terminator, resulting in the purchase of a second Terminator to boot!
While I use a linear tracking arm, I do not subscribe to the notion that one technology is superior to the other. It is in the implementation / execution. However, to find a matching pivot arm at Terminator’s price range is impossible.