John, I use what I consider in my humble opinion the greatest bargain in whole of high end, Trans Fi Audio Salvation Terminator T3Pro air bearing linear tracking tonearm, that cost me all of £800/$1k.
Google it.
Unlike the Kuzma Airline and Walker air arms etc, it uses a low pressure pump and very short (3") wand.
Despite what you might think, it tracks like a bloodhound despite appearing to be a bit "floaty" on my variably warped lps (my tt is designed so lps sit on Delrin cones w no clamp, the very opposite of having lps bonded to the platter w vacuum hold down).
However, in my new room which has been a revelation, my analog hasn't QUITE dialled in.
Hence, I'm looking at options...
I just looked it up. Very interesting. I glanced at how the arm mounts. It seems compatible with the Grand Prix, however will require a custom arm board. Not sure how much that will cost. I had to have a custom board made for my former LT and current Centroid. If you go this route, be sure to use the same metal that Grand Prix uses, it's part of the plinth damping when it bolts in...