I am looking at a new system for general word processing, internet, and accessing databases on a network. I am under the impression that DDR3 is better and faster (1066 MHz). However, when pricing systems am I better to go with the 4 GB DDR2 or 2 GB DDR3? Less memory, newer technology, and faster clock speed. The system will only need to last 3 years before another upgrade. Am I better off going with the 4 GB of the the older RAM or 2 GB of the newer DDR3?