Have heard both, to be honest the Oppo was described in such glowing terms in Stereophile that I had expected much more. I was quite disappointed.
I have the VB3.5 with the new analogue board upgrade, for me it's far better than the Puccini I used to own.
Hooked to a MacMini using an external 3Tb time capsule for storage, iTunes and PureMusic. For me, an excellent combo.
Had the Oppo in my system for a one on one, no comparison, Bel Canto better on every level. Strangely the only thing missing sometimes is that tactile involvement of changing disc, likened to picking what vinyl you will play next.
Andy