Setting Up Web-Hosting Server

We are a small Web Development Company. Earlier we were using a shared hosting account to show the demo of our web-development projects to our clients. But recently we purchased a i3 system with 4 gb dedicated ram and planned to make it our own hosting server. Cutting the long story short what we have as of now- 1. 1 i3 system with 4 GB ram and 500 GB harddisk 2. Dedicated Internet Connection with dedicated IP. What we are looking for- 1. Setup the server on linux - We already did so using ubuntu 11.10 and our hosting server is working absolutely fine but we want a more advance version. As of now we are using a ubuntu server to show the websites to our clients and it is working really great, we have hosted more than 100 websites on this server and without any problem it is running very smooth. We are also able to show the websites to our clients by providing them our public IP address and the link to the folder for eg - [login to view URL] We are also able to send emails from this server and much much more. As of now we are also willing to sell small hosting packages like 200 MB with 5-10 email address to our clients. Only for that purpose we are looking for someone who can setup a completely new server for us. The server can be setup using linux or centos we do not mind it. Kindly note that we have already used ehcp and many other hosting control panels and we were not happy with it. We are interested to use kloxo software to manage our hosting which is working on centos. We are a technical company and can not be fooled easily. We can easily figure out in few seconds if you experienced or a newbie and if you know what you are doing. So we would like to avoid time wasters and would like to focus on the work. If you want, we can provide you a complete new server with most of the work done like installation of centos etc. Regards