I use my prs trems a lot but they don't stay in tune as well as Sergios do. Not sure what the trick is. I Lube MY String slots and fulcrum screws.
I like the idea of Vela trem. Not sure what to think about HFS pickups being their choice.
I also can't usually get my PRS trem to stay 100% in tune with total dive bombs. Usually fine with anything short of that. My SE CU24 with a TusqXL nut stays pretty darn close, good enough to get through the last half of the the last song in my previous band's live set after a dive bomb in the solo, but if I check it on the tuner I can see that I'm a little out. I'm convinced it's a nut thing, and I think any guitar brand would have that problem with anything short of a locking nut. Although I would like to have someone that's a real ace with the PRS trem set mine up sometime and see how it compares.
Anyways, the VR Vela... fricken cool. I don't need one, as I don't ride a trem hard enough to need a Floyd. I can kinda see the 2 HFS pickups though - I've not cared for the Vintage Bass pairing with the HFS, at least the SE incarnation of those pickups. The VB was underpowered and lacking in midrange.
I recommend everyone watch the Guitar World performance that Vernon and crew did over the weekend. His playing on the Vela was nuts! If you don't get the guitar yet, you will.