Well you probably already know that I would lean towards the Marantz for two reasons. First of all, I have heard Marantz CDP's, owning a SA-11S1, and I like them quite a bit. I sold a couple of more expensive CDP's when I bought my Marantz SA-11S1 about 6 years ago. Now I haven't heard the Vincent, so this basically is a bird in the hand analysis.
The second reason that I would go with the Marantz is because of it's SACD capabilities. That was the key for me keeping this unit over an $8K BAT CDP, the Marantz sounded as good as the BAT on redbook, but offered the ability to play SACD as well. Not all SACD's are exceptional, but there are many very good ones that will better any redbook cd.
They both offer USB connectivity, which is a plus, but the Marantz has the flexibility of front and rear USB ports. As always, YMMV.
