Ed Tafaro – Owner Tafaro Associates
Go for mid range PC with enough horsepower to do what you need it to do today, and still be able to use it 3-4 yrs down the road.
If you are going to buy Dell look to order it online their retail product line is not the best quality.
Get a 64Bit / Multi core computer.
Multi-core Processor from (AMD /Intel – stay away from Sempron(AMD)/ and Celeron(Intel)