GraphicRiver - Magenta Poster/Flyer Template
The PSD file is very well organized, with color coded groups and layers named appropriately.
PSD | 2625px x 3375px (8.5x11" with .25" bleeds) | CMYK | 300 DPI | 213.2 Mb

Info:
http://graphicriver.net/item/magenta-posterflyer-template/131673