we have a web site (still in progress) with Magento.
The theme is very modified and we need:
1. optimization of the theme (checking for bottlenecks)
2. configuration of Varnish cache (the Varnish is installed on the server). We have dynamic blocks which have to be excluded from FPC
3. We have installed FPC and we can use it instead Varnish but again you have to configure few (3) blocks to be excluded from FPC
We prefer to use your server first for checking and configure the site.