I have a pushed Van R its the best riding shock I’ve had. Even with a ti spring I got second hand, its way of the lightweight of an air shock. I’d not get a Ti spring unless you can get it second hand – as messiah says, they’re not really worth the money new.
My Van has been in my spares box for years as a standby/replacement until recently, so its cost doesn’t really come into any factors for me. However, if I was looking at buying something from scratch, these days, air shocks are so close for most riding, I’d spend the cash on a second hand air unit and a service.