I have 4 machine, 3 desktops and 1 laptop, i will list them by order.
I am currently doing some changes and upgrade to them.
Production Machine:
Processor: Intel Xeon Core 2 Duo 3GHz
VGA: Geforce 9600 GT 1GB
Memory: 4GB DDR3 1333MHz
HDD: 80GB + 250GB + 1TB of 7200rpm each
Screen: Benq dual 24" LCD 1920x1080
Local server + Testing machine
Processor: Xeon Core 2 Duo 2.4GHz
VGA: Geoforce 9600 GT 1GB
Memory: 4GB DDR 1333MHz
HDD: 500GB 7200 rpm
Screen: Samsung 19" LCD 1600x900
Mac Mini
Processor: Intel Core I5 2.3GHz
VGA: AMD Radeon 256MB GDDR5
Memory: 2GB 1.333Mhz (Upgrading to 5GB soon)
HDD: 500GB 7200 rpm
Screen: Samsung 19" LCD 1600x900
All the above are merged into 1 big system using Synergy LAN based KVM.
Wireless Magic Mouse + Mac keyboard.
2 Big UPS to power the set.
Desk stand to carry the 4 monitors:
The entire set price is around ~$7000
Laptop - Acer Aspire
Processor: Intel Core I3 2.3Ghz
VGA: 256MB Shared
Memory: 2GB DDR3 1333MHz
Screen: 15.4" 1280 x 720
HDD: 250GB 5200rpm
Price: $550
(i love this laptop)