Build a Website

About to launch a Magento driven website (migrating from a Virtuemart store). Approximately 14000 products. The site has been developed using a lot of commercial extensions and is ready to launch in terms of functionality. Need an expert Magento developer to look at: 1. Speed/Server Optimization - the site loads really slow when full page cache is not active. Also performs very poorly on speed tests. This started happening recently when we moved the site to a new server and we cannot figure out the problem. Need to optimize the code and server settings to ensure it loads as fast as possible. 2. Magento Best Practices - Check whether all core and third party extensions are working properly and there are no major conflicts. I estimate that the work will take approximately 5 hours. There will also be ongoing work which will be typically adding functionality to the site from time to time (via custom and third party extensions).