BUILD PC 4SRCSD SERVER !

i wanna open 10 CounterStrike Source Servers.

but i dont know what kind of pc i need.
l'm planning to buy 3 Computers , each computer i will open 3 puplic servers
but theos all computers contected to 100GB internet speed.

Each pc will have :
intel® core™ i5-2400 cpu @ 3.10ghz
RAM : DDR3 2x8GB
HDD : 100 GB
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whats ur opinion? its good or bad ? and what kind of pc i need to run puplic CS:S server.

and pleas tell me what kind of proseser, ram and motherboard i need to open 5servers in one pc and thanks u for ur time