Thanks
@kapolczer for the shout outs and links to the reviews, I'm fresh off of testing both the Mara Pro PB and Nebbia while also having lots of experience with a Super Deluxe Air with the Linear (not XL) can. I've ridden the Fox X2, Fox Float X, and Ohlins TTX1 and TTX2 air shocks, but none of them on the Kavenz.
@Weirdo1 a lot of this will come down to what sort of feeling you like, but if I was spending my money, I'd go with the Mara Pro PB or TTX2 Air. The Mara Pro PB has a solid amount of damping range, my only gripe being that I find Manitou to be a little too heavy-handed with rebound damping...though I like faster-than-average rebound and only weigh 165 lbs. Ohlins is still my gold standard as far as just how much support you can get out of them without introducing harshness, but at your weight you may find the damping to be more than you'd like, and servicing Ohlins stuff is more costly and less user friendly than Manitou. While I haven't tried the TTX2 Air on my VHP 16, I have no doubts about it working very well — I'm actually hoping to track one down soon to round out an air shock shootout that I might be working on a bit this winter...
I won't restate too much about the Nebbia, but I have a hard time recommending it because of that air spring. It's a solid damper with lots of range, plus its nicely made, but Formula needs to revisit their air spring design. The RockShox SDU with the Linear air can worked well for me on the Kavenz, but I still couldn't get the amount of compression damping I wanted without the shock starting to feel a bit harsh.
All that said, my favorite shock on the VHP 16 is the Ohlins TTX22m.2. With my preference for high levels of compression damping, the TTX22m.2 balances having a ton of support while still feeling very grippy and supple. It seems to use just the right amount of travel all the time, and aside from having a bit of a top out clunk at faster rebound speeds, it is entirely fuss-free to live with.