x-cart Drupal7

Hi all,

I've just picked up a new client who's presently stuck with using x-cart as their E-commerce solution. I have them mostly persuaded that staged migration to Drupal 7 would be more economical and fit with their long term mobile strategy.

What I need now is a few Demo examples of Ubercart and/or Ecommerce that I can let them play with. Plus if anyone has any experience with x-cart migration and/or use of the Data module for external database connection I would be more than willing to pay for beers / coffee while I pick your brain.