We use only the latest, fastest web servers available from Dell, HP and Supermicro. Every one of our servers has at least two processors, 16GB of RAM and four hard drives with RAID protection. We place a lighter load on our machines than the other guys do, so your site has breathing room during busy periods and you can run more complex scripts. And we use CloudLinux to optimize.
Simple websites are best for low to medium trafficked sites with multiple authors and more frequent content changes, such as marketing websites, content websites or blogs. They provide a simple starting point for website which might grow in the future. While typically low cost, these sites require IT administration of the web server and are not built to be highly available or scalable beyond a few servers.