We migrated jmpetresort.com from Joomla 1.5 to Joomla 2.5.11. In addition, we created a custom, mobile responsive template and used a design very similar to the old site but with some improvements: larger fonts, revised menu system, new header, and lots of small typography tweaks.
Finally, we set up their shopping cart with CS-Cart and created a custom template to match their Joomla site.