While researching Small Form Factor (Desktop) PCs, I came across a number of interesting ones. Here are two I thought were worth mentioning:

The Dell Inspiron 530s has a Small Form Factor which is also referred to as a mini tower. The configuration which appealed to me was the 2.2GHz Intel Pentium Dual-Core E2200 Processor, 2GB DDR2 RAM, 250GB Hard drive, DVD Writer, and a 19 inch LCD Monitor. I’d definitely do something about the Windows Vista Home Basic, either upgrade it to Windows XP, or Vista Home Premium .

The second Dell is one I have mentioned previously; the Dell Studio Hybrid Desktop. It has quite a unique Form factor - definitely small - which reminds me of an external vertical DVD Drive. This unique system comes without a monitor, so a monitor should be factored into the price. My preferred configuration was with an Intel Core 2 Duo T5800 processor at 2.0GHz with a 800Mhz Front side bus and 2MB cache,  3GB RAM and a 160GB Hard Drive. The Hybrid Desktop comes standard with a Slot Load CD / DVD Burner and DVI and HDMI video out ports. VGA is not supported, so any monitor which is going to be connected to this system needs DVI (or similar) input.