What is the most full-featured cart out there in terms of administration and back-end logistics/inventory management?
I am currently using IC and reliability and maintenance issues have me venting.
I need something that really does it all- B2C, B2B, B2E, etc... with logins for dealers & W/D, dimensional shipping, inventory for product options, real-time invesntory stock quotes, real-time order tracking, XML product & stock queries for affiliates, totally customizable admin user interface, etc...
While most shopping cart software works 'ok' for 'most' applications I need something really special that I can run with and customize / develop further that will scale up to Tier 1 requirements & performance metrics.
I would further prefer something that uses MS technologies such as ASP & .NET and has the ability to be run under multiple domain names so I can maintain both a development and production environment at all times.
Thus far, I have ruled out most of the usual candidates such as IC, OSC, ZEN, etc.. for one or more of the above reasons.
Any suggestions from the more informed enthusiasts that have larger properties and more stringent technical metrics?