We're a large non-profit, one app per server, and used to be on a 3-year replacement schedule.  With the economic downturn, they're wanting to stretch them for 6 years.  

What has been your policy; has it changed due to the economy? 

Not being a hardware person, what do you consider Best Practice?

 thanks

I would suggest looking into establishing a virutal enviroment to run your servers.  I know big data centers are migrating to virutal environments due to the hardware cost saving.  In a virutal environment you can have  2-3 physical hosts running 10-15 virutal servers.  It was the best choice we made because we were in the same situation of 1 app per server.  Just be sure the physical hosts have plenty of processors, & memory.  You can email me if you want to discuss further. 

Paul 

Sounds great, but, since they've cut server money for the next 3 years, we can't do anything. 

 So many times when I update an app I have to bounce the server - wouldn't same still be true, but affect well more than its own app space?