I personally own a dual E5-2670, and a dual X5660 system. On the E5 system, I run 50 bots with around 40% cpu usage, and 40 on the X5660 system with around 45% CPU usage. You can rent dedicated servers with either of these CPU setups. I purchased my dual E5 setup for $325 and the X5660 system for $160. Neither are rack servers, they use normal sized ATX cases, have Hyper 212+ on the E5's and Arctic Freezer Pros on the X5660s. Everything is quiet and electric is cheap where I'm at so this is why I own my own and don't use VPS/Dedi servers.