In this paper we present our unified peer-to-peer review model for Open Access preprint repositories. Its objective is to improve the efficiency and effectivity of digital scholarly communication. The key elements of this model are standardized quality assessment instruments, public and private communication channels, special rankings and novel incentives. The model allows scholars to proficiently evaluate both the manuscripts and their peer reviews. These scrutinized manuscripts and peer reviews will then be made available to the relevant parties. These standardized quality assessments allow for new quality metrics for papers and peer reviews. The Reviewer Impact, which represents the peer review proficiency and peer review output of scholars, is one such metric. The model includes diverse rankings for scholars to appear in to receive better odds of having their own manuscripts noticed, read, peer reviewed and cited. Their specific ranking is proportional to their Reviewer Impact and the overall quality of their manuscripts. The Open Access preprint repository model is a suitable foundation for our model because of its high degree of accessibility, but little to no certification of its deposited manuscripts. With this combination we envision a novel, Open Access, peer-to-peer scholarly communication model that functions independently of, but not incompatibly with, the traditional journal publishing model: Scholarly Communication 2.0.