Finally made the decision - and the winner is the P2
I was really torn between the two (very similar in size, features, price, etc..) - so I called Mr. Oade to get his opinion. He said that if I am going to use it as a bit-bucket it really didn't matter, but for line-in he thought the P2 was better. He said the digital stage via line in is really very nice - in his opinion better than the Marantz. But he said for mic-in the 671 would be my best bet due to his mods. He also said there are some mods in the works for the P2, but there isn't very much room in there to do much work.
Since I will be going only digi-in or line in form the v2/psp2 - I chose the P2. Now where is my damn tax return.....