First off, I'd like to thank everyone's input. It's definitely helping with understanding what I'm looking at.

Here is a computer I found (I'm still snooping around for one).
HP Pavilion p6120t Desktop & DJ6988 Printer Bundle Dual-Core E5200 2.5GHz
LightScribe 16x DVD±R/RW Drive
Windows® Vista Home Premium

In the specs a few things caught my eye that left me baffled:

In:
Processor & Memory:
2MB L2 cache What does the L2 Cache mean?

And here:
Expandability (Total Slots):

* Total memory slots: 2 DIMMS
* 1 x PCIe x16
* 2 x PCIe x1
* 1 x PCI
I have no idea what DIMMS are or PCIe or PCI for that matter mean...