So basically, you want for 50,000$ of hardware to
1) Store Data?
2) WebServer?

How much data do you need to store? Raid 5? How much users will access your server from the Internet? What kind of website do you store? PHP/SQL?

If you want your hardware to fulfills the job at 100%, you need to tell us exactly the big line of your project in detail and what you except your server to be able to handle in data, processing, etc.