Oz,
As stated, the comparison was done a few years back. Two of my close friends currently own the Ref 3, another one had it for a brief period and didn't like it a bit. I don't have the kind of disposable income like they do, so I can only upgrade once every so often, like 6 or 7 years at a minimum. And go listen to new gears at their houses whenever they felt the itch to upgrade.
Like I said, I could be happy with either. I am sure the new Pass preamp would sound sweet. And it would be interesting to pit them against the Ref 3 or the soon-to-come-out Ref 5. But maybe when I win that big jack pot someday, I can try new toys every year. ;-P
For now, my GNSC modified LS-25 Mk I + Pass X350.5 will have to do....My next big investment is to build a dedicated room. It's in the works as I'm writing this.
FrankC