As mentioned above, the HP ML115 G5 might be a cheaper option however, especially if it's on offer.
Support for Intel LGA755 CPUs including 65m, and 45m Core 2 Extreme, Core 2 Duo, Core 2 Quad, Pentium Dual-Core, Celeron Dual-Core and Celeron with 800-1,333MHz front side bus.
Support for up to 95W TDP CPUs
Nvidia MCP7A MCP (GeForce 9300 MCP)
Two DDR2 DIMM slots for up to 8GB 667/800MHz RAM
Twelve USB 2.0 ports
Two SATA 3Gbps ports
One eSATA 3Gbps port
One Realtek RTL8211CL Gigabit Ethernet
Realtek ALC662 5.1 channel High-Definition audio codec
Onboard VGA, DVI-D and HDMI with HDCP 1.3 content encryption support (two simultaneous display outputs supported)
One PCI-Express 2.0 x16 slot (full x16 bandwidth)