Two computers so far (not including family PC's from when I was a kid)
Laptop
Model: Asus PRO80H
OS: XP Pro
CPU: 1.86 GHz Intel Dual Core
HDD: 120Gb
RAM: 1Gb
Desktop
OS: Windows 7 Ultimate
RAM: 6Gb
CPU: AMD Phenom II X2 555 overclocked to 4.02 GHz
HDD: 1TB Samsung SpinPoint
GFX: Radeon 6950 2GB GDDR5
PWR: Thermaltake Litepower W0356 700Watt Power Supply
MB: Gigabyte GA-880GA-UD3H 880G AM3 DDR3 ATX Motherboard
Cooling: Cooler Master V8
Case: Antec Three Hundred ATX Tower Case
Not perfect, but it does anything I ask of it and more
The Antec 300 case has to be the most efficient air cooling case around for the price. I absolutely love mine, and have retained it through two different rigs.