I am looking for a complete ecommerce package for an outfitter. All of the products will drop ship from distributors so it is critical that the order is received, payment processed, then xml notification sent to the distributors what they need to ship, and last of all the site must receive database updates on the status of the orders and email customers when they ship. The store should have the functionality of cabelas.com and basspro.com. I am open to the type of shopping cart but prefer php and some kind of cms for the site. I am partial to Drupal but will consider others with justification (speed, ease of use, security, etc). This is a large project. Please provide examples of work of similar scale and complexity.

Site requirements
-Store
+Receive product updates from the distributors periodically throughout the day
+Must be able to work with multiple distributors with different xml requirements
+Orders may have products from different suppliers, each supplier needs an xml representation of just their part of the order. The system must receive updates from the suppliers on status of the order as wells as shipping costs.
+Multiple reports will be necessary to track performance particularly the difference between shipping charged on orders and actual shipping costs rolled up from the suppliers.
-Recipes (forum where people can post recipes for different type of game)
-Brag board (forum where people can post pictures and some text about their trophies)
-Field Report (forum where people can post updates on where they have had success)
-Hunting info (forum to post latest in hunting)
-News
-Events (calendar with events)
-Mailing list signup (this must include the ability to send an email to all registered users of the site)

I will also require that the site is setup for flexible seo. There should be all the typical fields necessary as well as the search engine submissions and organic marketing to get a high page rank on google and yahoo.