[yuuta]

With the same or even cheaper price, you can get a much more powerful and enterprise grade refurbished rack server on eBay.

[disposedtrolley]

Yes, but you'll also need space for a rack and contend with noise, heat, and electricity usage.

Don't get me wrong -- I love my Dell R730xd but it's definitely a commitment.

[davidzweig]

Fujitsu TX100 s3, TX120 s3, Dell ML110, HP microserver series are little towers, quietish (you can change out the fans to make them practically silent).

[rasz]

or a much faster quad core laptop